So, as the title says, everytime I try to subdivide the mesh several time, it breaks.
For example, I create a simple cube from the library in surface mode. I subdivide fine till 5. Once I click subdivide one more time, the mesh breaks and appears with a lot of artifacts.
It happens with 3D Coat 4.5.19-21-22-23.
Here it how a cube looks after the 6th subdivision.
I also changed from OpenGL to DX but the problem persist.
https://gyazo.com/1c27168515a08afbdd91ff16cc3db6bf