ZigBee device intermittent loss

Sometimes after power outage one or more devices disappear. No restarts help. Only re-entering into the system.
Has anyone faced with this situation?

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There aren’t many power outages here but I have several uninterruptible power supplies anyway. The small 12V designed for wifi routers are really cheap and generally have a USB port. That would be okay for presence sensors and I have Zigbee LED strips that have USB-A connections.
For example:
https://a.aliexpress.com/_EIR7BTw
Is $25 but has 48V POE and I’ve seen much cheaper that only does 12V.

Hey

Are u referring to Zigbee devices?