My Odroid N2 with CoreElec plays jerky some 1080p HEVC/H265 content when using hardware decoder. If I switch to software decoder playing is smooth.
Here is a sample. It’s the small animation from Universal logo appearing from behind the Earth.
I am playing this up scaled to a 4K TV (3840x2160). If you look carefully, there is a “rush” moment when letter N appears (approx 00:11), and a slight pause when the letter U is about to reach left of the screen (approx 00:13)
As I said, I don’t see this behavior when choosing software decoder - everything smooth.
I updated to 9.2.6 and behaviour remains the same.