Stuttering after pause or black screen

Hi,
I have an odd issue with 4k video on my Odroid N2.

I have only seen the issue on 4k hevc vidoes, not on any 720p or 1080p content.

If I pause the video, or if the video fades to a completely black screen during the playback, the video starts to stutter and the audio goes out of sync. If I skip back or ahead 10 seconds the issue dissapears until I pause again or another completely black sequence of the film.

Anyone seen anything similar, or has ideas for a fix?

Please elaborate more when posting issues.

We need to know what version you are using at the very least.