Soundbar issues on C4

Hello,

I have been having issues with my C4 using soundbar. This is a replacement soundbar which still behaves like this, I thought it might have been defective the first one but... Im starting to think the problem is in the TV.

The soundbar is a LG S70TR, just installed with their provided hdmi. I previously had a samsung q600 which missbehaved too. It wasnt showing this behavior, but didn't work properly either.

I am very disappointed, should I start calling LG to have the TV replaced?

This happens with any audio source, does not matter the codec. Tried on many sources, live tv, plex, netflix...

Any suggestion is appreciated!