Collision Question - Physics Actor Surfing

Hi there.
I’m having an issue with physics actors, when I jump on them in just the right way (close to the edges I think) they start to move and jitter under my player characters feet.

Has anybody come across this before? Is there some way to fix this?

video

The issue resolved itself after setting the ‘Jump Off Jump ZFactor’ variable of the Character Movement Component to 0.
It didn’t re-occur though when setting this variable back to the prior default value of 0.5.