Looks like little bug, sort of. At 100% the motor isn’t quite full on. I said, ‘sort of’, because I now recall doing it on purpose: the motor driver overcurrent trip gets reset every PWM cycle, so it behaves better with larger startup currents.
I look at changing this in future version, but would like to do a couple of test first.
You can cheat however by using a variable to set the power to 101% 🙂