As per the latest news regarding this matter in Iceland, the affected pilot's went on a strike starting 1st of February and union members prevented contractors to step in as a result and a flight got cancelled. See below link.
Then what happened next was that Bluebird tried to stop the actions of union reps preventing strike violations only to fail, as the law's are not on their side. Since then, Bluebird has been bringing pilots to KEF only to let them rest at their handling company's office airside, so that union reps cannot prevent them from strike violations as the union reps cannot access that area.
https://www.fia.is/en/fréttir-fundag...nordic-strike/