[Ollo]

I'm not sure where I should start testing? Should I go back to OE 6.0 builds?

I'd suggest adding your comment here on the HiFiBerry Digi forum as apparently you're not alone, so at least it's not your hardware that is at fault.

It should at least be working with OpenELEC 6.0 as this is a supported option, so you could pester HiFiBerry for better support - after all, they sold you the hardware.

If a fix materialises (I don't know if it's a Kodi issue, or a HiFiBerry kernel issue), then chances are you'll see it here first.

Thanks a will try and keep further testing your builds. (Indeed I checked there before but this was already some time ago and I didn't noticed the mentioned post).