Sometimes when I import a new nwc model exported from Revit, every single clash becomes new. Which means that all of the clashes tests show up outside of the groups I had previously created, and all of those groups show up as resolved. I then have to go around trying to push everything back into the group from whence it came. I'm assuming this is because some models has a whole new collection of model element IDs. The issue seems to be very random and I can not figure out the cause of the issue.