Hi to all, I have had some issues with Emby Theater since installing it.
I have found the MPV player when switching refresh rates is returning from full screen to normal and if I try to correct it back to full screen "Normal" would be rewritten in the windowstate.json file causing full screen to fail on the next restart.
If Emby/MPV changes refresh rate the desktop border is clearly visible on the bottom and right side of the screen and chances are no audio because the window has lost focus and the exclusive audio mode in windows 10 would be lost.
If I turn refresh rate switching off the issue disappears.
My video is an intel HD4600.