I don't use the keyboard commands. Was drag and drop disabled?
More info: I drag the girl to the box asking for assignment, and the girl seems to go under it and can no longer be selected. Is that an old bug resurrected?
I haven't touched drag-and-drop functionality (and I never will, keyboard is never going to replace it, only supplement it, or act as a workaround if drag/drop fails), but if you don't mind I'd like to study this a bit further. Can you tell me which girlpacks you were using at the time? (So I can verify if it's the old bug returned or if it's a new thing).
It's also weird that it's at the threebooth stage, given that there isn't a behavior in the drag-drop that should interact with booths. But I'll do some tests to see if I can replicate it.
EDIT: Using drag-drop, dropping on the portrait box, or the video area itself, I have not been able to replicate any problem with the booth game with three booths, but I've been testing with girls I know don't trigger the old bug (specifically to rule out the recurrance of the old bug.)
That said, I think I've sorted out a way to errorcheck for bugs that move the starting location of the girl portraits into the boonies like that and I'll be looking at a potential solution soon. The challenge is that the script is currently resetting the girls to the start of a drag action after releasing the mouse, which should work provided nothing confuses the unity player into splitting that drag action, such as a frame skip.
EDIT2: EUREKA! I am pleased to say the fix I've figured out worked! Rather than set the 'snap to' start position post drag to where the drag starts, I set it to where the object is created at the start of the booth game. Which means those portrait boxes will snap back to their initial position and will no longer 'learn' a new starting position whenever a frameskip causes Unity to think you've started two drag motions! Take that, old bugbear!