LD160 is not affected from below

It's a really minor glitch, but it killed an idea I had.

Basically, if you place a spring under a Floating, Bobbing FOF and use it to hit the platform from below, it stays still, contrary to the expected behavior.

edit: The platforms do not work in any form of reverse gravity, either.

I imagine this also means that these platforms don't work properly in reverse gravity.