The long-distance bus operator actually wanted to offer a limited service over the Christmas period. Nothing will come of that, because the company canceled the comeback at short notice due to the German lockdown.
According to Flixbus, passengers who bought a ticket for the period from December 17, 2020 to January 11, 2021 should be contacted and receive a refund. In a statement, the bus operator writes that the decision to cancel the resumption of some lines was made "with a heavy heart". It is now hoping for a comeback in 2021.