Thanks - I have seen that problem with the workout history on the watchOS 10 beta.BETA FEEDBACK
I'm on Apple Watch Ultra watchOS 10 Beta and testing WOD 5.0. When I go into Workout History I cannot go back to the main menu. I'm stuck looking at a list of workouts and cannot use the app until I force quit the app. This issue was still present after a reboot.
EDIT: I just saw in an older post that you aren't looking into watchOS 10 beta issues. Sorry about that. If I'd realized this version of WOD was coming I wouldn't have installed the beta!
I will probably start looking at the watchOS 10 beta after the next beta release of WOD. Now that Apple are on beta 4 it should be getting pretty stable.