I have done three workouts recently intended to have an endurance focus (based on Lucy in the Sky with Diamonds, but staying slightly below the specified targets, aiming for a heart rate below aerobic threshold). In each case the actual focus of the workout is described at Time-trialliist and “pure”, even though the equivalent power has been 80 to 85% of my lower threshold and less than 68% of threshold/one hour power.
Thanks for reporting this. The 3600s FD has been used as a default for activities without high intensity. We’ll need to correct that logic in the code.