Buggy Forge is Killing Me!

Someone PLEASE tell me there’s a way to fix this. I spent hours building a map from MW2 last night, but could only finish up to a fourth of it. I get back on today with the intention of continuing, only to find that I can no longer touch any grouped objects.

I want to like this Forge, it’s amazing, but 343 needs to get their -Yoink- together if people are losing hours of work over this stupid crap.