I sent a message to support about a week ago but didn't hear back- possibly because the aircraft in question landed in the interim.
There is a recurring problem on Fornebu recently with aircraft not landing. It usually happens to the last flight of the day, and seems to be connected to schedule changes.
For example, my airline Air Bleriot F-AAGW should've landed about two hours ago and F-AAHB about an hour ago.
The problem seems to fix itself when the next flight is due to take off without any penalty, but it keeps happening. The first time was my last post about it:
As you mentioned, the flight is not landing, but with the next departing flight, your aircraft is operating normaly again. At the moment we do not have a solution, but there is no damage to your airline.