It seems that if the video file is 4K, subtitles won't display.
I add the subtitles the usual way – select the icon bottom left, go to the Audio/Subtitles submenu, select the triangle to open the add subtitles menu, add them and... nothing. Tried two formats: SRT and SUB, multiple times, including after reopening VLC.
Then I downloaded the 1080p version of the film – the exact same subtitle file loads and displays without issues. I've tried this with two different films (2160P vs. 1080p).
I'm running the latest version of VLC Player 3.5.2 on a Sharp Aquos Android TV (Android 11). All files are on my computer (LAN).
There are other problems but they are minor in comparison:
1. Although I have activated the option to automatically add subtitles (Settings > Subtitles > Auto load subtitles, they are never added automatically. The subtitles file always has the exact same name as the video file.
2. The subtitles language selection menu does not list my language, Bulgarian.
3. Subtitles that are ANSI encoded (typical here) display as ?????. Only UTF-8 encoded subs work.
Let me know if I can provide any additional information.