[Catalina] Preview appears to abruptly stop working
[Catalina] Preview appears to abruptly stop working. There is no particular pattern for replicating the behavior. After opening and closing multiple documents, switching to/from full screen, splitting the full screen with Word or other Preview instances, it simply stops responding. You have to quit and restart Preview. There is no need to 'Force quit'. In other words, Preview is very unstable in Catalina.
Has anyone experienced similar behavior? Any suggestions?
MacBook Pro Retina