Malaysian Airlines had unreliable airspeed recently on an A330 out of Brisbane. They managed to return, causing some damage to the landing gear on arrival. They didn't rush the return and used procedures to troubleshoot before making an approach.
This was at night at a relatively unfamiliar airport, MAS having recently restarted services to BNE after a prolonged break.
The B737 MAX is a far more conventional aircraft than the A330 and should be easier to go back to basics on if the automation plays up.