HEVCs sometimes don't work

[opflohr]

I think I have the same issue as reported here:

HEVC issues with Vero4K+

Well, just to be sure I tested the cold/warm boot hypothesis. But I could not conclude to anything since everything is fine again now… Either cold or warm boot, h.265 playback (even 4K/HDR/DTS-HD) is ok. I really don’t get it.

But I still am not sure how to fix it