Layer drag functionality disabled randomly

[budaloco]

I still don't know what causes it. But for some reason the drag function in layers just stops working. I can't seem to be able to rename layer either. It would take me multiple restarts to get it going again. I've solved it by cutting and pasting and using the arrange function but it's really annoying.

I'm using a XP pen tablet. But i've tried using the trackpad and it doesn't work either.