VR navigation 4.22.1 problem

After migrating my VR project from 4.21 to 4.22, the 2nd floor nav isn’t working for the player. It behaves like there’s no collision and fall through the floor.
Note that I hadn’t changed anything from the previous version where it worked perfectly.
I also played around with Navmesh and Recast settings, but nothing worked.

Any ideas?