It is quite common to land at an ftp too high, if you search for ‘overtest ftp’, you’ll get a good few hits. Here is a fairly recent active thread: Harsh Reality - You OVER test on FTPs (support group)
However, the TR workouts are scaled to the TR test protocol, so they should be ok to complete for the majority of users.
Oh, and the program won’t automatically adjust your ftp, you’ll have to do that manually. Or just drop the intensity of a workout.