Yes, and because of this it depends on how far they let it drift before taking action on station-keeping. Checking the two satellites at N2YO.com - real time satellite tracking does show a much bigger drift for F2 than G1.Anik F2 is broadcasting as hot as ever. Its failure is that it is spending a lot of fuel maintaining its positioning in the Clarke Belt because two of its four engines have decided not to work.
Therefore, Signal Quality of F2 transponders may degrade during the day/night as the satellite drifts more out of position, so favouring those F2 signals seems justified at this time.