Alt-tabbing will lead to GPU driver hang
I have no clue why this happens and i'm long past trying to figure out why dx12 game would even react to being alt-tabbed.
Nevertheless, the game randomly will stop rendering upon alt-tabbing, if that's not caught by the user within standard driver timeout time and remedied by alt-tabbing in and out of the game multiple times until the game decides to start working properly again, the driver will time out and game will throw a GPU hang error.
I don't know whether that's BF6 or NVIDIA driver problem but it seems to be occurring specifically in BF6.
Apparently this may be a freak interaction between nvidia 5000 series cards, nvidia drivers for said series and Windows 11 MPO implementation.
Disabling MPO seems to have resolved this particular issue.