sometimes it does not work properly. if the motor is not silent when it starts to rotate (slowly first) than you better release the throttle and start again.
maybe it helps to swap two phase wires or gently brake a little at the beginning (to have some load on the motor).
it's still beta firmware with a few bugs
No, I used sine wave for autodetect. I also ran autodetect twice, which can help sometimes, but all that did was get me close. I changed the settings to what I was running on my Mini-E and the Max-E is running much better. I still think there is some room for improvement in the tuning though.