Gadgetbridge "notify-" not reliable

How is gadgetbridge deciding when to fire a notify?

There is a list of allowed apps I believe. I actually tried to get a change into Gadgetbridge right here which allowed you to add apps to that whitelist. It never got reviewed/merged though :(

And where can I find the impl. of the bangle.js in gadgetbridge?

Just clone https://codeberg.org/Freeyourgadget/Gadg­etbridge and look for anything with 'Bangle' in the name :)

./app/src/main/java/nodomain/freeyourgad­get/gadgetbridge/devices/banglejs/Bangle­JSConstants.java
./app/src/main/java/nodomain/freeyourgad­get/gadgetbridge/devices/banglejs/Bangle­JSSampleProvider.java
./app/src/main/java/nodomain/freeyourgad­get/gadgetbridge/devices/banglejs/Bangle­JSCoordinator.java
./app/src/main/java/nodomain/freeyourgad­get/gadgetbridge/service/devices/banglej­s/BangleJSDeviceSupport.java