There's been an issue with notifications stopping after the bluetooth connection gets interrupted (by walking too far from the phone, etc) and then resumed. I've seen that myself a few times, but not on recent versions of the Bangle firmware, apps and the Gadgetbridge Android app. There's another Github issue that describes this here: https://github.com/espruino/Espruino/issues/2113
Regarding calls, since @Gordon doesn't see this issue on his self-built Gadgetbridge app you could probably build it yourself to work around this. It only seem to affect release builds (which is a little weird, but will probably be figured out eventually).
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There's been an issue with notifications stopping after the bluetooth connection gets interrupted (by walking too far from the phone, etc) and then resumed. I've seen that myself a few times, but not on recent versions of the Bangle firmware, apps and the Gadgetbridge Android app. There's another Github issue that describes this here:
https://github.com/espruino/Espruino/issues/2113
Regarding calls, since @Gordon doesn't see this issue on his self-built Gadgetbridge app you could probably build it yourself to work around this. It only seem to affect release builds (which is a little weird, but will probably be figured out eventually).