Door springs are set to the wrong weight.
In the case of appliances with a decor panel (built-under appliances) and (fully) integrated appliances, you can adjust the spring to the weight of the door as follows:
The adjustment screws are located at the front right and left in the plinth of the dishwasher.
Balance out the door springs using a screwdriver (TORX T20 or slot 1 x 5.5 mm):
Clockwise = tighter
Anti-clockwise = looser