I had this problem with physics in 2.3 after a clean update, but in my case physics is now working fine ,. I checked the controller code in the editor controller lua file and made my controller code the same.This made no difference at first but when I changed the phy file for a table model from convex hull to a box shape all my physics started to work well. Its a mystery. My controller has a mass of 10.0.
EDIT: Reducing controller mass to 7.0 made little difference it still works ok.( I use Bmax)