Couple of other instances of the air speed cap messing things up without the lock preventing it from being applied [1/2]

Actually, here's a visible example of this behavior in this set of pulley platforms in World 3-3!

Another sample.

Under the Surface of Classic Sonic When you look at the All-Stars source code, the equivalent subroutine to BrickShatter (BBKINT) says "Player shock jump up", so you're right that this behavior was intended. I'm glad that they accidentally screwed it up because the All-Stars behavior feels worse.