I can choose a other one. Then the poster become grey:

After hit the refresh meta data button I get the wrong picture again.
Here some log information:
Mar 27, 2020 19:51:52.583 [0x7fcf7a01a700] INFO - Plex Media Scanner v1.18.9.2571-e106a8a91 - Docker Docker Container x86_64 - build: linux-x86_64 - GMT 01:00
Mar 27, 2020 19:51:52.583 [0x7fcf7a01a700] INFO - Linux version: 4.9.0-9-amd64, language: C
Mar 27, 2020 19:51:52.583 [0x7fcf7a01a700] INFO - Processor Intel(R) Xeon(R) CPU E3-1225 v5 @ 3.30GHz
Mar 27, 2020 19:51:52.583 [0x7fcf7a01a700] INFO - /usr/lib/plexmediaserver/Plex Media Scanner --analyze --item 5074 --log-file-suffix Analysis
Mar 27, 2020 19:51:52.585 [0x7fcf8272b740] DEBUG - Opening 20 database sessions to library (com.plexapp.plugins.library), SQLite 3.26.0, threadsafe=1
Mar 27, 2020 19:51:52.646 [0x7fcf8272b740] DEBUG - Analyzing media parts for item 5074 (Birds Of Prey: The Emancipation Of Harley Quinn): 5021
Mar 27, 2020 19:51:52.646 [0x7fcf8272b740] DEBUG - [ID 5147] Media part analysis: /data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv
Mar 27, 2020 19:51:52.646 [0x7fcf8272b740] DEBUG - [MI] Opening input file: "/data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv"
Mar 27, 2020 19:51:52.647 [0x7fcf8272b740] DEBUG - [FFMPEG] - Opening '/data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv' for reading
Mar 27, 2020 19:51:52.647 [0x7fcf8272b740] DEBUG - [FFMPEG] - Setting default whitelist 'file,crypto'
Mar 27, 2020 19:51:52.672 [0x7fcf8272b740] DEBUG - [FFMPEG] - Format matroska,webm probed with size=2048 and score=100
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - st:0 removing common factor 1000000 from timebase
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - st:1 removing common factor 1000000 from timebase
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - st:2 removing common factor 1000000 from timebase
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - Before avformat_find_stream_info() pos: 6291 bytes read:33925 seeks:2 nb_streams:3
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 7(SPS), nal_ref_idc: 1
Mar 27, 2020 19:51:52.685 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 8(PPS), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 7(SPS), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 8(PPS), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 5(IDR), nal_ref_idc: 1
Mar 27, 2020 19:51:52.686 [0x7fcf8272b740] DEBUG - [FFMPEG] - Format yuv420p chosen by get_format().
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.690 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.691 [0x7fcf8272b740] DEBUG - [FFMPEG] - no picture
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.692 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.696 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.699 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.701 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.704 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 6(SEI), nal_ref_idc: 0
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.706 [0x7fcf8272b740] DEBUG - [FFMPEG] - nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
Mar 27, 2020 19:51:52.709 [0x7fcf8272b740] DEBUG - [FFMPEG] - first_dts 292 not matching first dts NOPTS (pts 0, duration 41) in the queue
Mar 27, 2020 19:51:52.710 [0x7fcf8272b740] DEBUG - [FFMPEG] - All info found
Mar 27, 2020 19:51:52.710 [0x7fcf8272b740] DEBUG - [FFMPEG] - After avformat_find_stream_info() pos: 383198 bytes read:438080 seeks:2 frames:118
Mar 27, 2020 19:51:52.710 [0x7fcf8272b740] DEBUG - [MI] * fe769bef4661df4f8620efb79983f6a12a0109e2 [mkv h264/ac3] Duration: 6532736ms, 1920x802 (2.394015) 23.976fps, bitrate=5130kbps, audio channels=6, optimizedForStreaming=0 ("/data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv")
Mar 27, 2020 19:51:52.710 [0x7fcf8272b740] DEBUG - [MI] Importing 13 media chapters.
Mar 27, 2020 19:51:52.710 [0x7fcf8272b740] DEBUG - [MI] Chapters had generic titles, clearing.
Mar 27, 2020 19:51:52.711 [0x7fcf8272b740] DEBUG - [MI] Closing input file: "/data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv"
Mar 27, 2020 19:51:52.713 [0x7fcf8272b740] DEBUG - Updating media item 5021, size=4189537498, metadata_item_id=5074
Mar 27, 2020 19:51:52.713 [0x7fcf8272b740] DEBUG - Updating part with ID=5147 [/data/Filme/Birds of Prey - The Emancipation of Harley Quinn/movie.mkv]
Mar 27, 2020 19:51:52.713 [0x7fcf7303c700] DEBUG - HTTP requesting GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=analyzing
Mar 27, 2020 19:51:52.714 [0x7fcf7303c700] DEBUG - HTTP 200 response from GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=analyzing
Mar 27, 2020 19:51:52.714 [0x7fcf7303c700] DEBUG - HTTP requesting GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=thumbnailing
Mar 27, 2020 19:51:52.715 [0x7fcf7303c700] DEBUG - HTTP 200 response from GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=thumbnailing
Mar 27, 2020 19:51:52.715 [0x7fcf7303c700] DEBUG - HTTP requesting GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=idle
Mar 27, 2020 19:51:52.715 [0x7fcf7303c700] DEBUG - HTTP 200 response from GET http://127.0.0.1:32400/:/metadata/notify/changeItemState?librarySectionID=11&metadataItemID=5074&metadataType=1&state=-1&mediaState=idle
Mar 27, 2020 19:51:52.718 [0x7fcf8272b740] DEBUG - Doing expensive tags write for 'Birds Of Prey: The Emancipation Of Harley Quinn' because something changed.