As it should be. Just a thought, once things open up again (please, Lord!) have you thought about trying Nosework with Liam? It's a much more individual and less pressured environment than obedience, and even if you never compete, it builds confidence in dogs - I've seen this in my classes with some really timid dogs. Plus it's fun to see them do what they do best - sniff!
The way our classes are structured, the dogs never interact in the class, each dog and owner work one at a time although owners watch each other's dogs work while the dog waits in the car. We've thoroughly enjoyed it and are blessed with an awesome instructor who makes it so much fun.