Since {648350e456490f8d6258e7de9bf94d3a6a34dbb2}, transform gizmos are no longer hidden during transform.
The same can be observed for rotation gizmos.
However, as a workaround for these rotation gizmos, there was already a drawing utility running.
With the gizmo and the utility this drawing is now being done twice.
So remove the utility/workaround and update the gizmo accordingly.