• // we will buzz when we enter the messages app

    But loadMessages is false. Look at the code right after:

        if (!quiet && (!global.WIDGETS || !WIDGETS.messages)) return Bangle.buzz(); // no widgets - just buzz once to let someone know
        if (global.WIDGETS && WIDGETS.messages) WIDGETS.messages.update(messages);
    

    So assuming you're not in quiet mode , if you have no widgets then it'll buzz, but if you have the messages widget then WIDGETS.messages.update is called and that buzzes when the widget is drawn.

    So... are you in quiet mode? Or maybe you have a clock face that deliberately hides the widgets?

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