AW3225QF, no sound through eARC with Custom Color HDR

Hey, 

I was wondering why I couldnt get audio from my earc system. I figured out the problem was my HDR settings. Custom Color HDR prevented my eARC Soundbar to work. I guess its a bug? After I switched to black 400 there was sound. By the way, my service tag is still not working and I have troubles getting in contact with the support.

Regards,

Itaku