So you need to hold the rear button on the back to detach your Joy-Con, right? Well, my left Joy-Con is starting to show signs that it can be detached without holding said button. All I had to do was just hold it up and then slide it up to remove it. The right Joy-Con does not do this at all, meaning you still have to hold the rear button to detach it. I don't know what's causing this. Any help?