3ds max dcc concave problem

Hello! I am trying to create physx scene in 3ds max and have strange behaviour of concave objects - they ignore collision with all other object, but don’t ignore gravity. I tried 3.0 and 3.0.1 versions of DCC. Can anybody assist me - what I am doing wrong? Or maybe it is bug in DCC? Maya version seems to work ok - but I have too few skills in Maya.

I’m having this issue too and I cannot find any answers why. Massfx works fine, but Physx doesnt work with concave objects