Sorry for the late answer.
Here some clarifications :
My rpi 3 is linked to my AV receiver, and my AV receiver is linked to my TV
Before my update I was using last version of LE, 9.2 I think, and everything worked fine
Since the LE 10 update, sometimes (not always) when I try to playback a video, my AV receiver loses the signal, or sometimes when I stop the video, the signal is sometimes also lost
I tried to bypass the AV receiver linking my rpi3 to my TV, and in that case no signal loss. So it seems that when the frequency is changed (my GUI is in 1980x1080p 60Hz) at the playback is the cause. If I set up in Kodi the "no change frequency", no signal loss.
So, I think something has changed in Kodi ?
Do you need a debug log or is it a known issue ?
Other thing, I have noticed that randomly during the video playback green dots on half of the screen appear and then suddenly disappear .. I don't know how to describe it precisely. Am I clear ?
I will provide a mediainfo of a file as soon as possible.
Thank you for your help.