Great @BigAlzy ! Then I wonder if you could try the very latest Plex Pass version of PMS from https://www.plex.tv/downloads/
It’s version 1.11.1.4760-58bcb2957 and that one includes a fix for the subtitle issue (without setting Burn Subtitles to Always). If you have a chance, please give that a try and let me know if it works! Thank you 
