Hi,
After upgrading mpv to 0.37.0, resuming the paused video by clicking the UI "play" button nor pressing the space key works -> nothing happens. With mpv <= 0.36.0, resuming works normally. The workaround is to move video forward/backward 10 seconds (left/right key) first. After that, resuming works again.
This is most likely upstream bug https://github.com/smplayer-dev/smplayer/issues/837
It should be fixed in smplayer 23.6.0.10190, or by adding the patch https://github.com/smplayer-dev/smplayer/commit/74690b30a816aa4644be4f83ffca096441713645
Regards, oni