As @Weagertron says, can you check that all the battery power saving stuff in Android is disabled for Gadgetbridge? That's most likely the issue here.
@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.
As @Weagertron says, can you check that all the battery power saving stuff in Android is disabled for Gadgetbridge? That's most likely the issue here.