Within the AI Simulation Window, I’ve never seen my Dynamic Endurance workouts (Group Ride, outside) change from 1 hour. I’ve been doing 3 hour group rides.
I would open a ticket with support if you haven’t already. Mine has never behaved like that since its launch, immediately started ramping up volume in a way that made sense.
Are you getting any red or yellow days on the days that those long rides are scheduled?

