[Closed] Editable_poly preserve UVs?

Hey

When move faces/vertices/edges in EditablePoly mode and Preserve UVs checkbox checked. It works like it shoud (not scretch texture). But if I do same with script texture will scretch. Why and how I can fix this problem?

Here’s code :

selection[1].preserveUVs = true
move $.selectedFaces [0,0,10]

Where I go wrong?

Here is image what shows problem

First coube is original cube (no modified)
Second coube is same cube top face moved up by hand with basic move and Preserve UVs on.
Third coube is same cube top face moved up by script with and Preserve UVs on.