Roku (only?) playback issue

[qnetso 22]

not sure maybe it's related to / same issue as this thread: 

but i didn't want to hijack it.

A while back (almost a year ago now) I moved from Windows to Unraid and this might be when the problem started. 

I've only seen this on the Roku - on both the normal and beta roku app. and my client is a roku streambar

Sometimes the video will freeze and the audio jumps back 5-10 seconds. once it replays the audio the video will start moving again and all will be fine. I can mostly force this error to occur by pausing and un-pausing the video. Typically it happens only once, but sometimes every 15 or so minutes. Sorry I don't have a lot of specifics - let me know of anything I can add to help.

My unraid is 7.2.5, I have emby configured to use my Nvidia RTX A2000. and using the community Emby App. Most all my videos are  MKVs Encoded as HEVC with AAC Audio. My Videos have always been MKVs. Unraid might have nothing to do with it, I only mention it because everything changed when I moved to unraid.