Troubleshooting dying motor

Hooked up a new controller from Amazon to my dual motor 500 watt bike. I’m a rookie so I just hooked it up to the rear motor. My commute is about 45 mins x 2 per day. It worked great for 2-3 weeks for a total of about 400 miles.

Then, yesterday, omw back, near the end of my trip, the motor started turning off. I let it rest for a minute and it finished the trip no problem.

Today the problem returned, I rested it and it helped but eventually it seed to stop working completely. It seems to be making the classic clunky sounds that accompany a bad motor.

Thankfully, I was able to hook it up to my other motor and had no issues.

So, obviously it’s a motor problem. My looming question is, might my controller have caused the damage?

Overall the now apparently dead motor probably only had around 2k miles on it.

I suppose I plan on opening up the motor and checking hall sensors but it’s all new to me. I also plan on not working the motor as much as I did with the first motor.

Any other tips/insights appreciated