Has anyone encountered this problem?Stuck when editing model！

Yep! just had the same problem, I've deleted everything and will start again, I think it may be caused by doing lots of edits and changes and flipping between the pano's and 3D views

When it happens to me,
I save the project,
close it and open it again,
everything returns to normal

Have that also. Seems to occur after deleting geometry and / or pano from project. After that I cannot recover the project by saving/closing/opening again.

Have to start again. Only started recently happening.

I work around by saving after almost every change, doing a save-as new file that way I can recover it again if needed.