Weird question… is there something that happens in your home (or the neighbors’) around the same time that could cause interference?
I once worked with a customer that couldn’t figure out why many devices went nonresponsive in the evening. After probing, it turned out that the whole family came home, started cranking the wifi and TVs (and what sounded like an industrial audio system) that started causing Zigbee devices to become nonresponsive. However, everything would work again in the morning and on weekends because people weren’t just sitting around with devices.
Check in with support@ and they can dig it to the event logs.
I am envisioning something like this:
