The door springs are set to an incorrect weight.
For built-in (under-counter) and (fully) integrated appliances, you can adjust the springs to the weight of the door as follows:
The adjustment screws are located at the front right and left in the base of the dishwasher.
Balance out the door springs using a screwdriver (TORX T20 or flat-head 1 x 5.5 mm):
Turning to the right = tightening
Turning to the left = loosening