Yesterday around 16:00h some Zigbee devices became unavailable, in the evening all (121) devices (all kind of brands) were unavailable. I use HA OS, ZHA for 3 years, no issues until now. Ctr is Conbee II. I went back from 2026.4.4 to 2026.4.2, no solution. Rebooted the NUC, had USB conbee out slot and back in. In setting - devices -Zigbee device I can Reconfigure, results: binding and reporting OK or even 'reconfiguration successfull. But all devices are still unavailable (Matter devices are OK). Any help much appreciated. Paul