The braking torque disappears during reverse rotation

Good afternoon.

Braking works normally in the normal direction, but during reverse rotation, I feel no torque under the same current, and the material is easily pulled away. The resistance of the coils in both directions is the same, and there is no mechanical jamming.

The manufacturer says that the magnetic powder brake should theoretically have symmetrical torque in both directions, so this shouldn't be happening. Is it possible that the magnetic powder is thrown to one side by centrifugal force during reverse rotation, preventing the formation of a magnetic flux?

Or is the internal rotor structure directional? Currently, it can only be used in one direction, making reciprocating motion very difficult.

Has anyone else encountered this problem? Is it possible to use it in both directions?

Thanks in advance for all help.