Apple TV 4k and Vizio Soundbar 5.1 Issue

Hello! So I have a Vizio 5.1 Soundbar, and LG CX TV, and an Apple TV 4k. When I setup my soundbar 6 months ago I was not getting 5.1 sound when setting it to Direct on my Apple TV. The weird thing was, I WAS getting 5.1 when I ran apps through LG directly.

One way I solved was by changing the Audio Format on Apple TV from AUTO to 5.1. But recently after an update that is no longer giving me 5.1 sound at all...even with the setting.

Anyone have a solve for this? I am pretty sure it isn't a Vizio issue since it works fine through LG TV.

Thanks!