Steps to reproduce:
1. Editing in multicam view.
Result: The preview only showing one camera, in full screen (inside the panel) and not showing the camera angle selection. It work again when you press a number to change a camera, then it shows again the camera angle selection with the preview on the side.
System info
Application: Premiere Pro (Beta) v23.5.0.15
OS: Windows v10.0.22621, RAM: 31.82 GB GB, CPUs (logical): 16