Maybe it is unrelated, but i have a somewhat similar issue.
My movies (only the picture) is freezing usually and there is audio if OMXplayer acceleration is OFF. If i turn that on, then i’m losing the audio on my mkv (probably DTS) files.
I’m not using any passthrough, the 8-bit dts hd… is enabled, etc… basically i’m just using default values in the Audio section.
Tried, and i can confirm it started to work (while both acceleration for omxplayer and the other remained enabled, passthrough remained disabled, so this was the only change I made)
This option has been in Milhouse (openelec) builds for a few months with no bug reports (and it works for me there).
I’m also not seeing a problem in my locally built debug builds of kodi Isengard which makes it harder to diagnose.
@popcornmix did you see my post with logs + the video from the link you gave me?
that video/audio plays ok for you?
there’s nothing in that log that help debug it?
I can increase log level to 2 if you need.