Forced MKV subtitles are being ignored

Server Version#: 1.18.2.2058
Player Version#: 4.8.4

I’ve been having issues getting forced subtitles to display. The audio is Japanese and the subtitles are English. They are all mkv files with default / enabled / forced properly set. Plex even shows them as such. From the best I can tell, it looks like Plex will only enable the first English matching subtitle (even though enabled=0, default=0, and forced=0) and completely ignore that the second is marked enabled=1, default=1, and forced=1.

VLC, Emby, Kodi, Infuse, and MrMC all seem to work as intended, so I do not believe this to be incorrect flags in the files.

MKV / Plex XML info below. Any ideas on a fix?

Thank you!

MKV info:

+ EBML head
|+ EBML version: 1
|+ EBML read version: 1
|+ Maximum EBML ID length: 4
|+ Maximum EBML size length: 8
|+ Document type: matroska
|+ Document type version: 2
|+ Document type read version: 2
+ Segment: size 4785216140
|+ Seek head (subentries will be skipped)
|+ EBML void: size 16
|+ Tracks
| + Track
|  + Track number: 1 (track ID for mkvmerge & mkvextract: 0)
|  + Track UID: 1
|  + Track type: video
|  + Default track flag: 0
|  + Lacing flag: 0
|  + Minimum cache: 1
|  + Codec ID: V_MPEG4/ISO/AVC
|  + Codec's private data: size 73 (H.264 profile: High @L4.1)
|  + Default duration: 00:00:00.041708333 (23.976 frames/fields per second for a video track)
|  + Video track
|   + Pixel width: 1920
|   + Pixel height: 1080
|   + Display width: 1920
|   + Display height: 1080
| + Track
|  + Track number: 2 (track ID for mkvmerge & mkvextract: 1)
|  + Track UID: 2
|  + Track type: audio
|  + Default track flag: 1
|  + Lacing flag: 1
|  + Codec ID: A_DTS
|  + Language: jpn
|  + Default duration: 00:00:00.010666666 (93.750 frames/fields per second for a video track)
|  + Name: Surround 5.1
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 6
|   + Bit depth: 24
| + Track
|  + Track number: 3 (track ID for mkvmerge & mkvextract: 2)
|  + Track UID: 3
|  + Track type: subtitles
|  + Default track flag: 0
|  + Lacing flag: 0
|  + Codec ID: S_HDMV/PGS
|  + Language: eng
| + Track
|  + Track number: 5 (track ID for mkvmerge & mkvextract: 3)
|  + Track UID: 5
|  + Track type: subtitles
|  + Default track flag: 1
|  + Lacing flag: 0
|  + Codec ID: S_HDMV/PGS
|  + Language: eng
|  + Forced track flag: 1
|  + Enabled: 1
|+ EBML void: size 715
|+ Segment information
| + Timestamp scale: 1000000
| + Multiplexing application: libmakemkv v1.12.0 (1.3.5/1.4.7) win(x64-release)
| + Writing application: MakeMKV v1.12.0 win(x64-release)
| + Duration: 00:24:18.498000000
| + Date: Thu Apr 12 21:47:44 2018 UTC
| + Segment UID: 0xc7 0xcd 0xc8 0xfb 0x93 0x3e 0xac 0x99 0x31 0x0b 0x55 0x1e 0x76 0x31 0xd6 0xa4
|+ EBML void: size 358
|+ Chapters
| + Edition entry
|  + Edition flag hidden: 0
|  + Edition flag default: 1
|  + Edition UID: 18036327088067443706
|  + Chapter atom
|   + Chapter UID: 11918501474467681072
|   + Chapter time start: 00:00:00.000000000
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:03:54.108875000
|   + Chapter display
|    + Chapter string: Chapter 01
|    + Chapter language: eng
|  + Chapter atom
|   + Chapter UID: 13180645330537453578
|   + Chapter time start: 00:03:54.108875000
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:05:24.407416666
|   + Chapter display
|    + Chapter string: Chapter 02
|    + Chapter language: eng
|  + Chapter atom
|   + Chapter UID: 6298529999146591332
|   + Chapter time start: 00:05:24.407416666
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:12:14.525458333
|   + Chapter display
|    + Chapter string: Chapter 03
|    + Chapter language: eng
|  + Chapter atom
|   + Chapter UID: 17629189090890383994
|   + Chapter time start: 00:12:14.525458333
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:22:32.476125000
|   + Chapter display
|    + Chapter string: Chapter 04
|    + Chapter language: eng
|  + Chapter atom
|   + Chapter UID: 6387346685594816142
|   + Chapter time start: 00:22:32.476125000
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:24:02.149041666
|   + Chapter display
|    + Chapter string: Chapter 05
|    + Chapter language: eng
|  + Chapter atom
|   + Chapter UID: 12129468206395044674
|   + Chapter time start: 00:24:02.149041666
|   + Chapter flag hidden: 0
|   + Chapter flag enabled: 1
|   + Chapter time end: 00:24:18.498708333
|   + Chapter display
|    + Chapter string: Chapter 06
|    + Chapter language: eng
|+ EBML void: size 1021
|+ Cluster[Plex Media Server Logs_2019-12-01_17-02-26.zip|attachment](upload://6uGXp7ZVI8vEpcDJeWw0Jy3j9Pm.zip) (4.6 MB) 

Plex XML

<MediaContainer size="1" allowSync="1" identifier="com.plexapp.plugins.library" librarySectionID="3" librarySectionTitle="Anime" librarySectionUUID="2419e677-dfd3-42f2-b86b-83351dc3d2e1" mediaTagPrefix="/system/bundle/media/flags/" mediaTagVersion="1574417695">
<Video ratingKey="10381" key="/library/metadata/10381" parentRatingKey="10380" grandparentRatingKey="10379" guid="com.plexapp.agents.thetvdb://82834/1/1?lang=en" parentGuid="com.plexapp.agents.thetvdb://82834/1?lang=en" grandparentGuid="com.plexapp.agents.thetvdb://82834?lang=en" type="episode" title="Xam'd at the Dawn of War" grandparentKey="/library/metadata/10379" parentKey="/library/metadata/10380" librarySectionTitle="Anime" librarySectionID="3" librarySectionKey="/library/sections/3" grandparentTitle="Xam'd: Lost Memories" parentTitle="Season 1" contentRating="TV-PG" summary="Akiyuki was living a peaceful life along with his friends and family on Sentan Island. This peace was disrupted when sudden war broke out and a strange force took control of his body. " index="1" parentIndex="1" year="2008" thumb="/library/metadata/10381/thumb/1575051704" art="/library/metadata/10379/art/1575051250" parentThumb="/library/metadata/10380/thumb/1575051250" grandparentThumb="/library/metadata/10379/thumb/1575051250" grandparentArt="/library/metadata/10379/art/1575051250" grandparentTheme="/library/metadata/10379/theme/1575051250" duration="1458498" originallyAvailableAt="2008-07-15" addedAt="1523627305" updatedAt="1575051704" chapterSource="media">
<Media id="15707" duration="1458498" bitrate="26247" width="1920" height="1080" aspectRatio="1.78" audioChannels="6" audioCodec="dca-ma" videoCodec="h264" videoResolution="1080" container="mkv" videoFrameRate="24p" audioProfile="ma" videoProfile="high">
<Part accessible="1" exists="1" id="15707" key="/library/parts/15707/1523627305/file.mkv" duration="1458498" file="/data/Anime/Xam'd - Lost Memories/Xam'd - Lost Memories - S01E01.mkv" size="4785216192" audioProfile="ma" container="mkv" deepAnalysisVersion="4" requiredBandwidths="38262,35167,32783,30939,29275,28523,26587,26213" videoProfile="high">
<Stream id="41020" streamType="1" codec="h264" index="0" bitrate="24711" language="English" languageCode="eng" bitDepth="8" chromaLocation="left" chromaSubsampling="4:2:0" colorPrimaries="bt709" colorRange="tv" colorSpace="bt709" colorTrc="bt709" frameRate="23.976" hasScalingMatrix="0" height="1080" level="41" profile="high" refFrames="4" requiredBandwidths="33635,30426,28018,26175,24583,23885,21948,21796" scanType="progressive" width="1920" displayTitle="1080p (H.264)"/>
<Stream id="41021" streamType="2" selected="1" default="1" codec="dca" index="1" channels="6" bitrate="1536" language="日本語" languageCode="jpn" audioChannelLayout="5.1(side)" bitDepth="24" profile="ma" requiredBandwidths="4791,4630,4630,4630,4630,4630,4630,4630" samplingRate="48000" title="Surround 5.1" displayTitle="日本語 (DTS-HD MA 5.1)"/>
<Stream id="41022" streamType="3" selected="1" codec="pgs" index="2" language="English" languageCode="eng" requiredBandwidths="55,55,55,55,55,55,55,55" displayTitle="English (PGS)"/>
<Stream id="41023" streamType="3" default="1" forced="1" codec="pgs" index="3" language="English" languageCode="eng" requiredBandwidths="47,47,47,47,47,47,47,47" displayTitle="English Forced (PGS)"/>
</Part>
</Media>
<Extras size="0"> </Extras>
</Video>
</MediaContainer>

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