Zigbee2MQTT - TRÅDFRI motion sensors not triggering events

Hi, after an HA initiated upgrade on my Zigbee2MQTT addon my TRÅDFRI motion sensors stopped triggering automated events. I can see the devices in Zigbee2MQTT, their battery levels etc, manually trigger them etc.

All my other TRÅDFRI devices and automatons are working fine.

Any suggestions on where to start welcome.

Do the Automation traces show any errors or is there anything in the HA system logs for Z2Mqtt?

no errors. i removed and re-added both, recomposed the automation and its working again, albeit intermittently. one of the two sensors has old firmware. can’t upgrade it via Z2MQTT either. the other one worked fine.