After further tests, it seems to only be my videos with 4k HEVC / 1080p h264 versions that have this issue.
I can also confirm that using ‘Play Version’ and selecting the 4k version does display the subtitles, so something’s up with default playback.
I tested with Android TV version 8.6.3 & 8.7.0, PMS version 1.28.1.6104, Shield TV Pro 2019 version 8.2.3
Also, all my subtitles are internal, so it’s not just an external sub issue.
I suspect this issue started with v8.6.0 based on the changelog, I might test that theory this weekend if I get a chance.
