Using app svtplay hdmi seems to be restarting, the screen goes black… and then after restarting the video has seemingly continued while hdmi was restarting. About a week week and a half ago it “worked” it seemed. Seems to as well to work better after a restart and gets worse (occurs earlier) after the first time.
I will look for something to deal with perhaps fixing the refresh rate. Not sure you saw the github link but the developer thought :
The plug-in serves HLS streams to Kodi. In your case it it ffmpeg that is doing the decoding and playback. This information might be of use in yourtroubleshooting.