u/Adorable-Ride7455

Any idea why this flight from FAR to ORD did this weird pattern then diverted to GRR? Once at GRR it sat on the taxiway for 2hrs before just now moving to a gate.

Also UA3658 from EWR to GRR has also been sitting on a taxiway for an 1:45hrs and hasn’t moved to a gate.

Other flights have arrived and taken off while both sit.