Yes. But this is not new to RC7. It usually happens if some error occured before. If you go to another form and back, you can switch to design mode only partly. The properties disappear but your form doesn’t repaint, although you are actually in browse mode.
My general impression is that all kinds of crazy stuff can happen once you had an error or warning, especially in calcs (something like “xy is not defined” or “cannot convert null into an object”)
I have not used 2.2 a lot and it always happened when I get a message, about a custom valuelist (showing text, returning integer → new check in 2.2) I have fixed al of these errors, and now I doesn’t appear anymore.