When in Edit Mesh Mode deleting faces, CC also seems to remove the diffuse map.

Randomly !

One time it deletes faces only , another time it turns parts (diffuse map ??) of the mesh white, pic 3.
Sometimes it turns the whole mesh white (pic 4)

The same procedure results in 2 different errors. (pic2> pic3>UNDO>pic2>pic4 )

This is very annoying because most of the time only single faces can be deleted without making an UNDO.