Random Disconnect and ZBJoin for Zigbee Bulbs

Has anybody else had issues with Zigbee lights that will randomly fall off the network, and then rejoin and decide to turn on? This seems to be happening across all of my EcoSmart ZLL bulbs.

The only indication I get in my logging when it happens is a zbjoin message from the device:

I went through support, but we didn’t find any useful solutions. I’ve eliminated electrical issues, as the lights share a fixture with other, identical bulbs, and it will only be one bulb at a time. Currently I have a notification setup to tell me when one bulb in a fixture turns on without the others, so at least know when it happens…

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