Audio interrupts

Sony Android TV 5.1, Kodi 17. I am playing an avi with mp3 and audio interrupts every 3 seconds for a fraction of a second, like 0.25s, video is still fine, no interruptions whatsoever. Then I open another movie for a few seconds, that one is ac3, then I stop it and go back to the original avi – but this time it plays just fine.

Anyone experienced something like that? Thanks!