Strange behavior between btBoxShape and btSphereShape in some cases.

[vovan4ik123-engine]

Probably corner case of library. Version 3.2.5.
I have static cube as btBoxShape + dynamic sphere as btSphereShape.

As image shows sphere not roling properly on inclined box surface if it is rotated 5 - 10 degrees around Z axis. If rotation angle less than 5 degrees or more than 10 everything works good.
In my case friction of cube = 2, friction of sphere = 80.
I found the more I increase friction of sphere and cube the worse it gets. (sphere bechavior on inclined box surface).