So there's no way to fix it. :( Thank you, regardless.
Viewing post in Hakuen Studio Mobile Controls for RPG Maker MV-MZ comments
I think this is solved. When the handleup event of any button or pad or joystick is received, you must check all the current touch points on the screen and if any are in the area of the button that receives the event, it means that it is still pressed, so you do not have to execute the event and that's it.