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DRV10983EVM: Minimum closed loop reliable RPM

Part Number: DRV10983EVM

Attempting to drive 22 pole BLDC motor with Kt value 82.  Phase to phase resistance is 7 ohms.

We are driving the motor with the EVM board and have had success with Open to Closed loop transition.

We desire to run the motor at low speeds 30-500 RPM and maintain a reasonable torque throughout the range.

It appears when at 60 RPM or lower the system will run but as soon as a small amount of load is applied, the calculated back EMF starts to rise and the motor faults out on Back EMF calculation.  In the 200-300 range, the motor appears to deliver the torque we desire.

Are there options or settings that can be changed to improve the condition when running at low speeds?