occasionally getting zero manifolds

[digi123]

Hi,

I have a sphere (rigid body) on on a flat cube (static). Usually when I roll the sphere around on the cube I would get 1 manifold to indicate that I have contact.
However occasionally, I'll get back 0 (zero) manifolds even though, graphically and looking at the position that the 2 should be in contact.

Is it ever expected that after a simulation that, even though the two objects appear to be in contact, you would get 0 manifolds?
I can also reproduce this using contact callbacks.

Thanks.

[Mind Calamity]

This is just a guess, and might not actually be what's going on, but are the two bodies deactivated ?

I think that could result in you getting 0 manifolds, not sure.