Yep...sounded like you demaged the motor a bit...especially when you hit the 220 mark.
Send it back to have them work on it. Their tech support is excellent.
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S
Upon further inspection, I decided to take the front plate off and check the bearing. Bearing is perfect, no play and smooth as glass, so I pulled the rotor out to check it. Well the kevlar or whatever, fiber wrap around the rotor is pretty badly frayed and separating from the rotor. I had a 60mm Medusa do this once, they replaced the rotor and good as new.