I think it's a breath box issue, the reason moves have no gap is because of individual hit/blockstun properties. in this instance, the breath box changed the move after he switches stance and changed the hit stun . so the move must have just barely enough block stun to keep it gapless. to fix this random occurring glitch, NRS needs to add 3-4 frames of block stun to the first hit. Just my 2cents.