I have recently been using the split full-screen feature on my MacBook Air 2020 (Ventura 13.4.1), where I am writing my dissertation on one half of the screen and looking at my advisor's comments on a previous draft on the other (see screenshot). I am using Adobe Acrobat Pro.

Occasionally (often after the computer falls asleep due to inactivity), Acrobat just disappears, and clicking on the icon in the doc results in no action. If I try to "show all windows" for Acrobat, nothing appears either.

Being able to split screen like this is super useful, and I wanted to call this to your attention. It has worked fine with Mac's native pdf viewer, preview, but I prefer Acrobat for the comment layout/features. Hopefully this can be resolved soon :)