Hey Justin, I haven't updated the UCC in a few months due to a concern about it breaking my project (even though i know it probably wouldn't, saying that it has done this since i got the UCC but i just never got around it trying to fix it).
Repo scene-wise it won't be possible as the game is launch ready and im not sure how to package just one scene up.
From playing around with the settings and doing lots of tests myself it seems to be an issue with what the controller is considering (grounded) and then its sticking to it, I know the base unity controller had a setting called "shell offset" which seemed to fix this issue when using the base fps controller,
** important , it only does it on mesh colliders
What are your thoughts?