Why does Deconz randomly forget devices?

Running Deconz add-on in HA with a Conbee II. I just updated the HA operating system. On reboot, one of my Philips Hue bulbs is unavailable and has completely disappeared from Deconz and Phoscon GUI’s, as if it was never paired in the first place.

Is there something I’m missing? It was working fine before the reboot. I have had randomness like this ever since I began using Deconz. My Zigbee channel is 24 and WiFi is channel 1 so they do not overlap. There is not a ton of distance between my Conbee and the Hue bulb. This shouldn’t be a signal issue.

I think I have seen a post where it was advised to leave the zigbee channel at 15 for some issues.
Maybe you can try that…