In the game, all the default keybind are set for qwerty keyboard. But the game automaticly apply the right key for azerty keyboard without needing us to rebind all the key to their azerty counterpart. So if "w" is the key to move forward, it will move forward with z without requiring us to change the keybind.
In workbench, there is no such thing. So the z key instead of "moving forward" will apply the lower height adjustement.

Could you make the workbench keybind work like the game one ?