Android Split screen stopped working

Hi, 

I have a Samsung Fold 7 and regularly use the split screen function. In particular, at my gym we use Truecoach for my program but I record my session on my Epix watch. At the end of the workout, I bring both apps up dude by side to ensure they both have the same recording my session.  I was able to do this two days ago. Now I get a message saying Connect can't do split screen.