Server Version#: Up to date
Player Version#: Roku with latest version/Mac with new macOS
I use Roku to watch Plex from my iMac and external HDD. I have no problem playing except MP4s and SRTs, the subtitles delays for a couple of seconds (relay captioning is turned off). With VLC app on computer does right timing. I think MKV with subtitle-embedded is right on the track with subtitle. But for rewind/fast-forward/instant rewind button, for MKV with subtitle-embedded, I’m stuck with keeping ending up to resume time when I try to fast-forward. And I tried to fast forward to near ending of movie, I ended up going back to other time like middle of movie. I already updated on Roku and Plex server and everything. I turned the subtitle off, it wasn’t different at all.