This app has struggled for some time, at least 6 months. I use Microsoft's SwiftKey keyboard and for the past while when I would select "lock keyboard" at the bottom it would do nothing, which is a real pain on a tablet because I need to be able to not accidentally edit while I'm carrying this giant touchscreen. Now (after an update) I select the "lock keyboard" and my keyboard and everything goes away, and it is impossible to get any functionality until I restart the device. I pay to avoid this