Sculpting Clay Strips issue

Hi over there. I've got a problem and can't understand is this a bug or may be I'm missing something.

In sculpt mode with dyno turned on (4px, Subdivide Collapse, smooth shading) , clay strips brush behaives strangely.

It just creates polygons and collapses mesh from time to time. Other brushes works fine. (You can see in the video)

Will be grateful for anu suggestions how to fix this.

Blender 2.93.4 LTS