I have a similar issue with a lot of files. This only seems to affect PleaxAMP on iOS and iPadOs. I can play them on Plexamp on windows and android or the Plex app on all systems (windows, mac, android an webOS tv) and web.
On some albums I can’t even see the tracklists. On Carplay previously stated that it was unable to connect to the server, but now I can see track names even thought on iOS only I still can’t.
here’s log error (that it doesn’t seem to help much to me)
Nov 10, 2021 00:23:51.393 [0x6ba23000] DEBUG - Networking: Completed request 57: (GET https://x.x.x.x:xxx/library/metadata/8947?includeFields=thumbBlurHash&X-Plex-Device-Name=iPhone%2012%20mini) with code 200 (have 4333 bytes) in 50 ms.
Nov 10, 2021 00:23:51.408 [0x6ba23000] DEBUG - Networking: Completed request 59: (GET https://x.x.x.x:xxx/library/metadata/8947/children?includeFields=thumbBlurHash&X-Plex-Device-Name=iPhone%2012%20mini) with code 200 (have 18951 bytes) in 64 ms.
Nov 10, 2021 00:23:51.409 [Javascript] INFO - Networking: Error parsing JSON from request 59: JSON Parse error: Unexpected token: u
Nov 10, 2021 00:23:51.409 [Javascript] INFO -
Nov 10, 2021 00:23:51.414 [0x6ba23000] DEBUG - Networking: Completed request 58: (GET https://x.x.x.x:xxx/library/metadata/8947?includeRelated=1&asyncAugmentMetadata=1&augmentCount=20&includeFields=musicAnalysis,thumbBlurHash&X-Plex-Device-Name=iPhone%2012%20mini) with code 200 (have 4402 bytes) in 70 ms.
Nov 10, 2021 00:23:51.414 [Javascript] WARNING - Error loading album data.
Nov 10, 2021 00:23:54.424 [Javascript] INFO - Memory usage: 35.0 MB Native: 63.1 MB
Nov 10, 2021 00:24:21.468 [0x05608580] DEBUG - BASS: Application going into background.
Nov 10, 2021 00:24:21.468 [0x05608580] INFO - BASS: Suspending player.
Nov 10, 2021 00:24:21.474 [0x05608580] INFO - BASS: Setting audio session active to 0.
Nov 10, 2021 00:24:21.480 [Javascript] INFO - App: Application state changed to inactive.
Nov 10, 2021 00:24:21.485 [Javascript] INFO - App: Application state changed to background.
Nov 10, 2021 00:24:49.265 [Javascript] INFO - Memory usage: 35.0 MB Native: 56.5 MB
Nov 10, 2021 00:24:49.900 [0x05608580] DEBUG - BASS: Application returning to foreground.
Nov 10, 2021 00:24:49.904 [Javascript] INFO - App: Application state changed to active.
Nov 10, 2021 00:24:49.904 [Javascript] INFO - Cloud: [RecentPlays] Syncing.
Nov 10, 2021 00:24:49.904 [Javascript] INFO - Discovery: Refresh based on app activation.
Nov 10, 2021 00:24:49.904 [Javascript] INFO - Discovery: Fetching hubs for library /library/sections/1 server 87f65db040556247544e0b9cf9f53e4fc952d034.
Nov 10, 2021 00:24:50.059 [0x6ba23000] DEBUG - Networking: Completed request 61: (GET https://192-168-68-14.00e1d1f5246e4670b3ad8a0630d88d84.plex.direct:32400/hubs/sections/1?count=4&includeExternalMetadata=1&includeMyMixes=1&includeAnniversaryReleases=1&excludeElements=Similar,Mood&includeLibraryPlaylists=1&includeStations=1&includeStationDirectories=1&excludeFields=summary&includeFields=thumbBlurHash&X-Plex-Device-Name=iPhone%2012%20mini) with code 200 (have 27273 bytes) in 151 ms.
server log:
Nov 10, 2021 00:23:51.428 [0x7fb0a3647b38] DEBUG - Request: [x.x.x.x:xxx (Subnet)] GET /library/metadata/8947?includeFields=thumbBlurHash (6 live) TLS GZIP Signed-in Token (ajmaranhao)
Nov 10, 2021 00:23:51.431 [0x7fb0a30ebb38] DEBUG - Request: [x.x.x.x:xxx (Subnet)] GET /library/metadata/8947?includeRelated=1&asyncAugmentMetadata=1&augmentCount=20&includeFields=musicAnalysis,thumbBlurHash (6 live) TLS GZIP Signed-in Token (ajmaranhao)
Nov 10, 2021 00:23:51.432 [0x7fb0a300bb38] DEBUG - Request: [x.x.x.x:xxx (Subnet)] GET /library/metadata/8947/children?includeFields=thumbBlurHash (6 live) TLS GZIP Signed-in Token (ajmaranhao)
Nov 10, 2021 00:23:51.448 [0x7fb0a502cb38] DEBUG - Completed: [x.x.x.x:xxx] 200 GET /library/metadata/8947?includeFields=thumbBlurHash (6 live) TLS GZIP 19ms 2274 bytes (pipelined: 1)
Nov 10, 2021 00:23:51.463 [0x7fb0a502cb38] DEBUG - Completed: [x.x.x.x:xxx] 200 GET /library/metadata/8947/children?includeFields=thumbBlurHash (6 live) TLS GZIP 31ms 3128 bytes (pipelined: 1)
Nov 10, 2021 00:23:51.468 [0x7fb0a502cb38] DEBUG - Completed: [x.x.x.x:xxx] 200 GET /library/metadata/8947?includeRelated=1&asyncAugmentMetadata=1&augmentCount=20&includeFields=musicAnalysis,thumbBlurHash (6 live) TLS GZIP 37ms 2296 bytes (pipelined: 1)