It seems that there is an problem with saving level of detail when derived assembly is created/updated. The selected LOD in dialog "created derived assembly" on third page is not saved. I can reselect this, update derived part and if I re-open this dialog, the selected LOD is correct, but when I save and open the derived part, then the selected LOD in this dialog is wrong (another LOD is selected). Is this known issue and is there any solution ? We use Inventor 2012SP2.