It's quite possible: I didn't test the feature extensively (as a genuine role-player, camera restrictions, which are OOC restrictions, are unacceptable to me and thus blacklisted): I simply backported Marine's code (fixing the obvious, code-level bugs), but didn't check the algorithm itself.
Yes, Marine is the person to address the bug report to. I will backport her changes when she will have the issue fixed.
I don't even have a joystick (well, got one, but it dates back from the "game port" days, in the 90s, and never needed to buy a newer one for my newer, game-port-less computers...), and even less a "spaceball" (whatever it is), so no wonder I didn't find this issue while testing the new code.