Norwegian Company Avinor was managing the sector, and apparently their employees have had some staffing issues lately.
Bit of background. Avinor's management has been a very big problem for a very long time here in Norway. Their people management is artrocious, their cost-saving measures are savage. The ATCO union has been fighting Avinor as well as they can, regularly disrupting Norwegian flying traffic.
The amount of leave owed to ARTOs is now so huge that it will be impossible to ever pay it back to them in the form of time off.
They are stretched beyond snapping point, it is affecting their home lives and appears to be affecting the quality of the ATC service they are able to provide. These guys & gals are desperate.
Avinor management is constantly changeing & floudering.
ATCwatcher might well be correct in his assumption as to why this has been leaked to the media, at the same time, the whole ATC question is
such a hot potatoe here in Norway that even the general public has started to take a keen interest in anything ATC related.