On Firmwares shipped on KickStarter Bangle.js please either leave Debug Info set to Hide in Bangle.js's Settings, or update to the latest Bootloader version using https://banglejs.com/apps.
Is it possible you had set 'Debug Info' to 'Show' in settings?
I know it's a frustrating gotcha - it's fixed in the latest JS bootloader, but obviously if you can't update the bootloader then you're in trouble!
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.
I think it might be what's mentioned here: https://www.espruino.com/Bangle.js+Development
Is it possible you had set 'Debug Info' to 'Show' in settings?
I know it's a frustrating gotcha - it's fixed in the latest JS bootloader, but obviously if you can't update the bootloader then you're in trouble!