The problem of the random HDMI CEC wake-ups and related issues identified: it was caused by the “Aeon Nox: SiLVO” plug-in/skin. Hope this might help someone who falls into the same pit.
Later update: This proved to be WRONG! The cause is somewhere else, the issue is not solved!
Since updating to 19.4 RC3 from 19.3 on Odroid N2+ my .M2TS format music videos now stutter continuously. The audio is OK.
Tried a clean install of the latest nightly build (20220226), but the problem remains.
Log: http://ix.io/3Rgp