Dolby Atmos - Rear Upfiring Speakers Not Engaging (Q990F Soundbar System)

Hey team,
Just wanted to flag an audio issue I’m experiencing with the Samsung Q990F Home Theatre soundbar system.
While Dolby Atmos is detected and working on the soundbar’s front upfiring speakers, the rear upfiring speakers do not engage when Dolby Atmos is enabled on PS5.
I’ve tested other PS5 games where the rear upfiring speakers work correctly with Dolby Atmos (Horizon Forbidden West, for example), so this appears to be specific to Battlefield 6.
The only way to get a full surround mix with all upfiring speakers functioning is to use Linear PCM instead of Dolby Atmos. When using PCM, the rear upfiring speakers activate correctly for overhead sounds like missiles, aircraft, and helicopters.
Has anyone else experienced this issue with a similar setup? Or is this something the audio team is aware of?

Thanks.