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4 months agoI had a couple of Aqara sensors awhile ago (vibration sensor and door sensors) and they always fell off the network randomly and required re pairing. Aqara don’t seem to properly follow the zigbee standard, so unless you’re using their gateway there’s a good chance it will just stop working - or at least that’s been my experience. I replaced them with different brands and haven’t had a problem since.
I wasn’t clear from your post if most of the devices are Aqara or not but if they’re all that brand then I would guess this is your problem.
I have one of the 3rd reality ones and it’s been good, only had it get stuck one time in a year and I think it was just a low battery thing. It indeed does use a AAA battery, but the sensor is expensive for what it is unfortunately.