"interview complete", but device doesn't work

I upgraded my zigbee2mqtt setup from a Conbee II to a Conbee III stick, and took the opportunity to re-pair all (and rename some) of my 110+ devices. Most of them work absolutely fine, but I have a handful of devices that interview successfully, but don’t work:

I have “last seen” enabled, and they just never get seen again after successfully completing the interview process no matter what buttons I press, or if I re-re-pair them. I’ve tried changing the device batteries and updating the firmware on the Conbee to no avail.

Anything else anyone can think I could try? These devices all worked for months on the Conbee II stick.