After patch 3
During my playthrough using Nvidia surround to do a 32:9 ratio splitscreen experience.
The conversations no longer move to the cutscenes with the mocaped models but rather just have the text and voice played out with the game screen frozen.
However, if the 2nd player joins in to listen. It will play out normally.
HOWEVER HOWEVER, after the conversation ends or when the player leaves the listening, the image from the previous conversation will be permanently taking up the btm part of the screen, as much as the black bar for UI will take up.
The game will now be squashed in visuals and then the cursor will be offset a little higher than the indicator.
My girl and I had been having a blast playing bg3 up until this patch and now it is technically playable, but grating as all avernus for long sessions.