Avatars can't stay seated

Here's a bug that's really annoying, and I'm sure you've all run into it by now. Sometimes your avatar will unseat itself for no reason, most often only a fraction of a second after sitting. The effect *seems* to be more pronounced at higher altitudes, but also happens at ground level. Sometimes it helps if your avatar is flying before you try to sit, but not always.

What causes this? Is there any way at all to avoid it? Is it going to be fixed in the next release?

Ive noticed this as well..

With my cordova elevators, people have to sit on them before they start moving. Doing this on a high-altitude platform is not an easy task, the avatar keeps wanting to pop off the seat.