Tidal Streaming Dolby Atmos Problem

[andyp]

I know there is a wealth of knowledge on this group in the field of music and audio/video equipment. I am hoping someone can help me with this problem I have. I recently upgraded my TV to an LG OLED C3 and now I can finally listen to the Tidal streaming app. My Pioneer Elite SC-LX701 plays Dolby Atmos fine through my OPPO UDP-203 (pic 3) but Tidal streaming Atmos from my TV using the ARC in/out through the Pioneer AVR is not being recognized as Atmos. I played the Tidal Dolby Atmos speaker ID track to confirm it is not assigning channels properly. It doesn't see my height speakers and is combining the surround back left and right with my surround left and right. When I check status on the Pioneer, it displays "AutoSurround", "Dolby D+" (pic 1 & 2) and the height speakers do not show confirming it is not Atmos (pic 2). I have pored through the settings on both the TV and AVR and have not figured out what the problem could be.
Any suggestions would be greatly appreciated.

 

[LuvMyQuad]

I'll take a shot here. My guess is a wrong setting on the TV. Is there a way to tell the TV to bitstream it's audio output?