Uncrouching a character on a physics object causes the character to penetrate the object only when physics substepping is enabled

This does not repro when physics substepping is disabled.

The sequence of events in the character uncrouch code (UCharacterMovementComponent::UnCrouch) causes the capsule to move up then increase its size, however the substepping cause the capsule size change to occur before the location change. I tried disabling the "allow scoped movement updates" in the movement component to rule that out, but this defect still occurs.

Load the attached project/map, or create a similar setup as in the UDN issue (a simulated cube on a slope, with a character crouching on it).

Crouch and uncrouch the character, with physics substepping turned on and the framerate limited in a way to force substepping to occur.

Observe the uncrouch causes the character capsule to penetrate the cube and apply a large force to it.