NX12 Sheet Metal Edit Parameters Issue

Hello Folks,

with NX12, (evry Version until 12.02) we have an issue while editing a flange in sheet metal.

I created a tab and a flange and then i tried to edit the flange. The Edit Option is set to "Edit Parameters" for the features. Then the following waring occours.

If i change the Edit Option to EDIT with Rollback, the issue is not there. Is this on purpose?

IN NX11 it works with both options. I did not find any thing at GTAC or at any Board / Forum.

Any ideas?