That's actually a feature, not a bug: it's yet another way to get out of a horizontal space that you powerslid into.
Ah, ok. Unfortunately, just as useful for someone who is committed to wedging themselves through a 1 tile gap into a lower area that they can't escape from. Although at that point you probably just have to accept that you're really asking for it. It takes a fair bit of effort to jam yourself in there, so I don't see it as likely that anyone who did it would then be overly surprised when they can't just jump back out.