How do you solve THIS problem?

[geodave]

Okay, I'm trying to build a new level in which Chip starts on top of a teleport. Here's a pic:

http://cczone.invisionzone.com/index.php?/gallery/image/37-startonteleport/

This works fine in Lynx. If you step onto a popup wall and then back onto the teleport, Chip gets teleported away as expected.

However, when I test in TW MS, if I step U and then D, Chip gets stuck on the teleport, but not just stuck, he bounces like he's stuck on ice.

So, what's up with that?