I think, this glitch is new, but I'm not sure. I discovered this today, while I was speed running Odd Mushroom.
to do this: 1.climb the vine 2.press A to get down and don't move 3.take out a bomb, press Z and R for shield in order to drop the bomb(the bomb has to be over links head when you drop it) 4. wait for the explosion
that's it ;)
Now you can't press any C-button and B. If you hang or jump of a edge or climb somethinh the glitch is away, but you can sidehop and backflip of every edge; then the glitch is still there
Maybe this is useful anytime, but I don't know. I'll test it