Gforth almost always crashes when an external keyboard is connected or disconnected. This applies to both Bluetooth and USB keyboards. It's especially a nuisance with my bluetooth keyboard which disconnects frequently for power-saving. If the message, "files unpacked, restart gforth" was present before the crash, it will be present on restarting too.
Android versions: 7.0, 6.0.1 Gforth versions: 0.7.9_20200716 and previous. It has been happening for as long as I've been using Gforth on Android. I'm sorry for not reporting it before.