There seems to be a fairly consistent issue with input handling around the Control3D elements.
Any time you have two inputs down on a control, it is then forever in the down state, never receiving any additional mouse events.
You can repro this with any Control3D element, but heres an easy sample:
- Left Mouse Down
- Right Mouse Down
It is likely completely unrelated, however I have now had a few instances where a single mouse down > up will get into the same state when the up happens off canvas. I can’t find a reliable repro for this for the life of me, so only mentioning this as an aside in case some link is evident to someone else.