The below diagram is the problem. It can happen after wear, damage or defect. The small black plastic "button" shown in the picture called "center push switch" can become worn and/or displaced as it is only held in place by a small plastic tab.
My best advice to avoid this is to avoid pressing the stick down often and hard. Don't take the piss out of the stick. You don't need gorrilla force to make it work.
My best advice to avoid this is to avoid pressing the stick down often and hard. Don't take the piss out of the stick. You don't need gorrilla force to make it work.