Yeah he was the very first person that I used and practiced for like 10 mins with and went directly into ranked.
That b+4 was a huge part of my strategy too. Let's just say I was "surprised" by it not working.
It is like the characters animation doesn't recover in time for it to connect.
If you like freefall kombat and are somewhere near a wall(or need a lucky 30% to win the round) pop them up and 11,11,111 until you hit a wall. It moves them pretty far across the screen.
(or coax a breaker out of them if you are worried about RAGE)