Plex stops playback after 20-30 seconds

Server Version#: 4.34.4
Player Version#: 4.34.4

Hey guys - recently I am having a really hard time dealing with Plex.
After choosing media to play (on any device - this happens on all devices - mobile, desktop, chromecast, nvidia shield, etc) the video just stops - no ‘buffering’, the play/pause button shows that it’s meant to be playing but the time doesn’t move.
Always playing back original quality - no subtitles.

I have made sure everything is up-to-date, I made sure hardware acceleration is on, database is optimised (through troubleshooting menu).

The media is stored on WD Reds in a DS918+ Synology NAS.

This issue has made Plex unusable for me, if someone could please help guide me in the right direction I’d appreciate it so much.

Some log highlights I found (could be wrong, dunno what I’m looking at really):

Log Highlights
Jul 31, 2020 14:03:15.605 [0x7f508fa23700] DEBUG - [Now] User is speedy2662 (ID: 1)
Jul 31, 2020 14:03:15.605 [0x7f508fa23700] DEBUG - [Now] Device is Android (SHIELD Android TV).
Jul 31, 2020 14:03:15.606 [0x7f508fa23700] DEBUG - [Now] Profile is Android
Jul 31, 2020 14:03:15.606 [0x7f508fa23700] DEBUG - [Now] Updated play state for /library/metadata/2917.
Jul 31, 2020 14:03:15.606 [0x7f508fa23700] DEBUG - Statistics: (a84b9195eb4b07fb-com-plexapp-android) Reporting active playback in state 1 of type 4 (scrobble: 0) for account 1
Jul 31, 2020 14:03:15.609 [0x7f50dfd11700] DEBUG - Completed: [192.168.2.254:49350] 200 GET /:/timeline?audioStreamID=7128&bufferedTime=296&duration=1262394&guid=com.plexapp.agents.thetvdb%3A%2F%2F254243%2F2%2F7%3Flang%3Den&key=%2Flibrary%2Fmetadata%2F2917&playbackTime=98020&playQueueItemID=6240&ratingKey=2917&state=paused&time=291762&timeStalled=40&token=xxxxxxxxxxxxxxxxxxxx (8 live) TLS GZIP 8ms 498 bytes (pipelined: 69)
Jul 31, 2020 14:03:25.605 [0x7f50dfd11700] DEBUG - Auth: authenticated user 1 as speedy2662
Jul 31, 2020 14:03:25.605 [0x7f508fa23700] DEBUG - Request: [192.168.2.254:49350 (Subnet)] GET /:/timeline?audioStreamID=7128&bufferedTime=296&duration=1262394&guid=com.plexapp.agents.thetvdb%3A%2F%2F254243%2F2%2F7%3Flang%3Den&key=%2Flibrary%2Fmetadata%2F2917&playbackTime=108022&playQueueItemID=6240&ratingKey=2917&state=paused&time=291762&timeStalled=50&token=xxxxxxxxxxxxxxxxxxxx (8 live) TLS GZIP Signed-in Token (speedy2662)
Jul 31, 2020 14:03:25.606 [0x7f508fa23700] DEBUG - Client [a84b9195eb4b07fb-com-plexapp-android] reporting timeline state paused, progress of 291762/1262394ms for guid=com.plexapp.agents.thetvdb://254243/2/7?lang=en, playbackTime=108022ms ratingKey=2917 url=, key=/library/metadata/2917, containerKey=, metadataId=2917, source=
Jul 31, 2020 14:03:25.607 [0x7f508fa23700] DEBUG - Play progress on 2917 'Sound EffeXXX' - got played 291762 ms by account 1!
Jul 31, 2020 14:06:04.066 [0x7f508fa23700] DEBUG - [Now] User is speedy2662 (ID: 1)
Jul 31, 2020 14:06:04.066 [0x7f508fa23700] DEBUG - [Now] Device is Chromecast (Chromecast).
Jul 31, 2020 14:06:04.066 [0x7f508fa23700] DEBUG - [Now] Profile is Chromecast
Jul 31, 2020 14:06:04.066 [0x7f508fa23700] DEBUG - [Now] Updated play state for /library/metadata/2917.
Jul 31, 2020 14:06:04.066 [0x7f508fa23700] DEBUG - Statistics: (9abpdaao6q6fh43fjp0xj81d) Reporting active playback in state 2 of type 4 (scrobble: 0) for account 1
Jul 31, 2020 14:06:04.069 [0x7f50dfd11700] DEBUG - Completed: [192.168.2.254:49524] 200 GET /:/timeline?ratingKey=2917&key=%2Flibrary%2Fmetadata%2F2917&playbackTime=21112&playQueueItemID=6363&state=buffering&hasMDE=1&time=305000&duration=1262000 (10 live) TLS GZIP 91ms 848 bytes (pipelined: 9)
Jul 31, 2020 14:06:06.922 [0x7f50dfd11700] DEBUG - WebSocket: client initiated close
Jul 31, 2020 14:06:06.922 [0x7f50dfd11700] DEBUG - handleStreamRead code 1: stream truncated
Jul 31, 2020 14:06:06.922 [0x7f50dfd11700] DEBUG - NotificationStream: Removing because of error
Jul 31, 2020 14:06:06.922 [0x7f50dfd11700] DEBUG - Completed after connection close: [192.168.2.254:49338] -3 GET /:/websockets/notifications (11 live) TLS GZIP 583820ms 30673 bytes
Jul 31, 2020 14:06:06.956 [0x7f50dfd11700] DEBUG - Auth: authenticated user 1 as speedy2662
Jul 31, 2020 14:06:06.956 [0x7f508fa23700] DEBUG - Request: [192.168.2.254:49536 (Subnet)] GET /:/websockets/notifications (10 live) TLS GZIP Signed-in Token (speedy2662)
Jul 31, 2020 14:06:06.956 [0x7f508fa23700] DEBUG - WebSocket: Performing handshake from origin 
Jul 31, 2020 14:06:06.956 [0x7f508fa23700] DEBUG - Beginning read from WebSocket
Jul 31, 2020 14:06:11.529 [0x7f508e88f700] DEBUG - BPQ: onConsiderProcessing: Idle (true)
Jul 31, 2020 14:06:11.529 [0x7f508e88f700] DEBUG - BPQ: [Idle] -> [Processing]
Jul 31, 2020 14:06:11.529 [0x7f508e88f700] DEBUG - BPQ: generating queue items from 0 generator(s)
Jul 31, 2020 14:06:11.530 [0x7f508e88f700] DEBUG - BPQ: generated 0 item(s) for queue
Jul 31, 2020 14:06:11.530 [0x7f508e88f700] DEBUG - PlayQueue: 0 generated IDs compressed down to a 20 byte blob.
Jul 31, 2020 14:06:11.530 [0x7f508e88f700] DEBUG - PlayQueue: 0 generated IDs compressed down to a 20 byte blob.
Jul 31, 2020 14:06:11.530 [0x7f508e88f700] DEBUG - BPQ: [Processing] -> [Idle]
Jul 31, 2020 14:06:13.706 [0x7f508e2b3700] DEBUG - Transcoder segment range: 0 - 28 (28)
Jul 31, 2020 14:06:13.707 [0x7f508fa23700] DEBUG - Transcoder segment range: 0 - 29 (28)
Jul 31, 2020 14:06:13.973 [0x7f50dfd11700] DEBUG - Auth: authenticated user 1 as speedy2662
Jul 31, 2020 14:06:13.973 [0x7f508e2b3700] DEBUG - Request: [192.168.2.254:49524 (Subnet)] POST /log (10 live) TLS GZIP Signed-in Token (speedy2662)
Jul 31, 2020 14:06:13.973 [0x7f50dfd11700] DEBUG - Completed: [192.168.2.254:49524] 200 POST /log (10 live) TLS GZIP 0ms 274 bytes (pipelined: 10)
Jul 31, 2020 14:06:13.973 [0x7f50dffff700] DEBUG - Auth: authenticated user 1 as speedy2662
Jul 31, 2020 14:06:13.973 [0x7f508fa23700] DEBUG - Request: [192.168.2.254:49516 (Subnet)] GET /:/timeline?ratingKey=2917&key=%2Flibrary%2Fmetadata%2F2917&playbackTime=21112&playQueueItemID=6363&state=buffering&hasMDE=1&time=305000&duration=1262000 (10 live) TLS GZIP Signed-in Token (speedy2662)
Jul 31, 2020 14:06:13.974 [0x7f508fa23700] DEBUG - Client [ryo3bfr2yx2nqhzn4jyhlumh] reporting timeline state buffering, progress of 305000/1262000ms for guid=, playbackTime=21112ms ratingKey=2917 url=, key=/library/metadata/2917, containerKey=, metadataId=2917, source=
Jul 31, 2020 14:06:13.975 [0x7f508fa23700] DEBUG - Play progress on 2917 'Sound EffeXXX' - got played 305000 ms by account 1!
Media Info
General
Unique ID                   : 239258956392860162021905860867155554738 (0xB3FF994EC1C434A20EBDB9F37B2FF1B2)
Complete name               : Z:\Plex\TV Shows\Impractical Jokers\Season 2\Impractical Jokers S02E07 Sound EffeXXX 1080p Amazon WEB-DL DD+ 2.0 x264-TrollHD.mkv
Format                      : Matroska
Format version              : Version 4
File size                   : 2.07 GiB
Duration                    : 21 min 2 s
Overall bit rate mode       : Variable
Overall bit rate            : 14.1 Mb/s
Encoded date                : UTC 2018-05-10 02:09:27
Writing application         : mkvmerge v19.0.0 ('Brave Captain') 64-bit
Writing library             : libebml v1.3.5 + libmatroska v1.4.8

Video
ID                          : 1
Format                      : AVC
Format/Info                 : Advanced Video Codec
Format profile              : High@L4
Format settings             : CABAC / 4 Ref Frames
Format settings, CABAC      : Yes
Format settings, ReFrames   : 4 frames
Codec ID                    : V_MPEG4/ISO/AVC
Duration                    : 21 min 2 s
Bit rate mode               : Variable
Bit rate                    : 13.9 Mb/s
Maximum bit rate            : 15.0 Mb/s
Width                       : 1 920 pixels
Height                      : 1 080 pixels
Display aspect ratio        : 16:9
Frame rate mode             : Constant
Frame rate                  : 29.970 (30000/1001) FPS
Color space                 : YUV
Chroma subsampling          : 4:2:0
Bit depth                   : 8 bits
Scan type                   : Progressive
Bits/(Pixel*Frame)          : 0.223
Stream size                 : 2.04 GiB (98%)
Writing library             : x264 core 148 r2623 d5b2374
Encoding settings           : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=34 / lookahead_threads=5 / sliced_threads=0 / nr=150 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=150 / keyint_min=76 / scenecut=0 / intra_refresh=0 / rc_lookahead=150 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=15000 / vbv_bufsize=31250 / crf_max=0.0 / nal_hrd=vbr / filler=0 / ip_ratio=1.40 / aq=3:1.00
Default                     : Yes
Forced                      : No
Color range                 : Limited
Color primaries             : BT.709
Transfer characteristics    : BT.709
Matrix coefficients         : BT.709

Audio
ID                          : 2
Format                      : E-AC-3
Format/Info                 : Enhanced AC-3
Commercial name             : Dolby Digital Plus
Codec ID                    : A_EAC3
Duration                    : 21 min 2 s
Bit rate mode               : Constant
Bit rate                    : 224 kb/s
Channel(s)                  : 2 channels
Channel layout              : L R
Sampling rate               : 48.0 kHz
Frame rate                  : 31.250 FPS (1536 SPF)
Compression mode            : Lossy
Stream size                 : 33.7 MiB (2%)
Language                    : English
Service kind                : Complete Main
Default                     : Yes
Forced                      : No

Text
ID                          : 3
Format                      : UTF-8
Codec ID                    : S_TEXT/UTF8
Codec ID/Info               : UTF-8 Plain Text
Duration                    : 20 min 51 s
Bit rate                    : 108 b/s
Count of elements           : 824
Stream size                 : 16.5 KiB (0%)
Language                    : English
Default                     : No
Forced                      : No

Logs:
Plex Media Server.log (1.2 MB)
com.plexapp.system.log (46.4 KB)

Plex Media Server Logs_2020-07-31_14-16-02.zip (2.2 MB)
plex xml.txt (3.5 KB)

Here ya go! @trumpy81

What should I do in this case?

This is making Plex absolutely unusable - which is a shame as I really love this piece of software.

Those files should be absolutely fine - they have worked before and work on my computer completely fine.

I don’t want to give up on Plex, but I dunno if I can continue with it stopping every 10 seconds

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