Locate "snubber" in the red rectangle. Notice how the round plastic pin goes into the upper plastic sleeve, if you take the further steps to "go inside" and clean, the pin needs to go back here.

Carefully attach sticky pad to plastic "plunger" The pads were from Lidl, so I had them lying about. The small one 10mm x 1mm thin. The added thickness makes the plunger push switch actuator down further. Thats the repair done.

Green circle, shows the correct placement of the Start Actuator. Plastic arm moves freely to the right of switch.

Please check that the cutout works when the bin is out and the top cover open.