I also have this bug.
Compile and save does not fix it.
Restarting the editor does fix it.
I have reproduced this on 2 separate machines so far.
I haven’t tried to find the repro case yet as at first I thought it was just a random bug until I got it on my home machine as well. Will continue to look into why.
The selection box that forms, and prevents panning the viewport around, is originating from the near Event Pre Construct default node in the BP. If I move the node out of the way, the box still starts there.
All right click navigation functionality is lost in all other BP windows as well, but no selection box forms.
I have no breakpoints in my BP.
