leo, I have the same problem right now. I was landing them fine, took two hard falls, and now I can't land them anymore. I lean so far back that even if I do get the handle it just gets ripped out on the landing.
I think it's pretty much all mental. I know I'm leaning back so that I don't go over the front on landings, and I need to get out of that habit. What I've been doing is taking my HS 180's big and really waiting until the last second to rotate. Hopefully that'll help me wait a little bit longer and stay balanced when I start trying 360s again.