Jitter when CharacterVirtual is standing on a diagonally downwards moving platform

Hi Jorrit, there's an issue when a CharacterVirtual is standing on a platform that is moving downwards but also sideways. See the following video:

https://github.com/user-attachments/assets/09d93b68-c998-4552-b910-fdf03bc35207

Note that everything works fine as the platform moves up, but when moving down the avatar jitters sideways relative to the ground.

Patch to repro is to change line 630 of Samples\Tests\Character\CharacterBaseTest.cpp to

mBodyInterface->MoveKinematic(mReversingVerticallyMovingBody, pos + Vec3(0, mReversingVerticallyMovingVelocity * 1.0f * inParams.mDeltaTime, mReversingVerticallyMovingVelocity * inParams.mDeltaTime), cReversingVerticallyMovingOrientation, inParams.mDeltaTime);

Cheers, Nick