Hi, I had this same problem after updating PS4 to Software ver. 4.5 and now is back again after update to software ver 6.71. (The old thred: https://emby.media/c...4-no-subtitles/)
After updating everything works great but no subtitles (external srt) are displayed. I have tried to turn them on and off with no luck. I have tried many movies that used to work fine.
Software ver. 6.71
Emby server Version 126.96.36.199
Ubuntu linux 16.04.2
Thank you Emby Team!!! 8-)