I'm using MZ & an 8bitdo gamepad controller. using the start button as a common event to pause the game works but then when you press the same button it doesn't unpause the game. I'm guessing because it's calling no the same common event that is only set to pause the game. if you could unpause the game I'd just have a conditional branch and switches to see wether it's on or off but I don't think that's how this plugin works.
I'm also using button common events.