I just changed to Libreelec yesterday from running Kodi on Windows, because I don't like the PC feel and it defaulting to windows login all the time.
I am using the same hardware but am experiencing audio drop out and sync issues.
I have it set to passthrough audio and auto change refresh rate. I have also tried all the available audio output options "hdmiO, hdmi1, analog etc, but all similar results. If I set my AVR from video passthough to video adjust that fixes the audio drop out but not the sync.
The only ad-in I have installed is PlexKodiConnect (PKC) which I also used in my previous windows setup.
Hardware is : ntel NUC 10th Gen BXNUC10I5FNH4 i5-10210U
Any assistance would be great.