Sounds like with this sort of grip it is better to just focus on keeping your right wrist bend constant and forget about the left.
Bergsey,
Do not neglect the Left Wrist Action (Component #18 ). As Clubhead Control, its perpendicular Cocking and Uncocking and rotational Swiveling are too important to ignore.
Nor should you neglect the [Left Wrist] Hinge Action (Component #10) and its Clubface Control, Learning to hold the Left Wrist vertical to each of the three Basic Planes (Horizontal, Angled and Vertical) through Impact is mandatory.
The Right Wrist, if it moves at all, moves in accordance with the Left, not vice versa.