Which Bangle do you have, and is your watch firmware (both the JS and the actual watch) up to date?
It's possible that the Gadgetbridge message is causing an error (maybe because of low memory, or a conflicting app?) and that's causing the problem.
@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.
Which Bangle do you have, and is your watch firmware (both the JS and the actual watch) up to date?
It's possible that the Gadgetbridge message is causing an error (maybe because of low memory, or a conflicting app?) and that's causing the problem.