Recently purchased an 85 inch Q70c and a Q60c 3.1 soundbar. Both less than a month old.

Soundbar is in HDMI 3 with a high speed cable and in the correct HDMI slot on the soundbar.  Input set to D. In. When I go to select sound input the TV only gives tv speakers or optical receiver.  No HDMI option. There is no optical cable attached. 

I ended up connecting via Bluetooth for a temporary workaround. Oddly, if I switch the TV input to my PS5 the HDMI connection works and the soundbar switches to TV eArc like it should.

If I switch back to cable box it goes back to TV speakers only, not even the prior Bluetooth connection. 

Any ideas how to fix this? Pretty big letdown to be honest considering all the money spent. Had to return the first TV when it arrived damaged and would really prefer not to go through that headache again as the whole ordeal took about 3 weeks before I had a new TV.