This is not a troubleshooting thread so maybe start your own thread or ask in the noob questions thread.
The first thing to do is figure out if you got a fault code when this happened. Any fault for any reason can cause a single side cutout, and feel like what you said. If not a fault then telemetry on the motor temp or just disabling motor temperature sensor by depinning it, or unpluging hall and temp sesnsors and going sensorless will help debug if that’s your issue.
This thread may be helpful it touches on all the temperature sensor issues FAULT_CODE_OVER_TEMP_MOTOR (feat crash at 47kph)
EDIT: was not in a trouble shooting thread. got moved to noob questions.