Is it possible you had some other computer (or even the App Loader page on your phone) still connected to Bangle.js?
Bangle.js can only handle one active connection, so if it's connected it won't advertise, so you wouldn't see it showing in the Gadgetbridge menu...
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Is it possible you had some other computer (or even the App Loader page on your phone) still connected to Bangle.js?
Bangle.js can only handle one active connection, so if it's connected it won't advertise, so you wouldn't see it showing in the Gadgetbridge menu...