I used to have an emoji password for my Android phone, and had the exact same issue after a reset! It's an odd but pretty terrible failure mode for locking oneself out...
You say locking oneself out, but I decline to consider any situation where a password can be set but not later entered as one where the user bears even a modicum of fault.
You say locking oneself out, but I decline to consider any situation where a password can be set but not later entered as one where the user bears even a modicum of fault.