My watch face is updated every 500 ms when document is not hidden. I want do the same when Ambient mode is turned on. And it works well but in a while it works like Ambient mode is ‘document.hidden’, so watch face isn’t updated any more. I need to reboot device and it works fine again.

What is a reason? What do I need to do?

document.addEventListener(“visibilitychange”, function() {
            if (!document.hidden) {
                interval = setInterval(update_watch, 500);
            }

            else {   //or if (document.hidden) no matter, the same effect
                clearInterval(interval);
            }
            
        });

I don’t even use window.addEventListener “ambientmodechanged”

I added just two cases.

– If hidden then stop updating.

– If not hidden then start updating