After a fight with Vinewrath Bane and some jungle exploring, Pesterfly Cane out of the sudden starts homing to an unknown target far off the screen - I had to resign from using it, because it failed to home onto nearby enemies, as it curved downwards/backwards towards unknown target, gaining ability to pass through blocks. The ability to pass through blocks seems a bit strange, because normally it can't do this. If I'll see this bug again, I'll make sure to document it.