I have copied the following section of walkway from my castle model…

I created a new empty model and pasted the face at the origin, and also used Paste In Place. These 2 faces were then grouped, and a different material applied to the group…

The face nearest the origin divides into 2 correctly (resulting in a total of 3 faces)…

However, the other face ‘divides’ into 6, with the parent group material applied!!!..

I have attached the simple test model so that you can reproduce this scenario for yourselves.

You will not fully comprehend the frustration and the amount of time this defect is wasting!

If there is any explanation, workaround, or fix coming soon, I would very much like to know.

V17 face division defect.skp (22.9 KB)