I haven’t seen anything regarding zigbee devices, but there have been quite a few reports of something similar with zwave, and usually Fibaro, Since July this year. Often with devices which had previously been paired and then rejoined. So something odd on the platform side.
Not sure if these are all exactly the same problem, but they all have similar symptoms, they all started recently, and many of them are for devices which previously worked fine. 
Fibaro dimmer 2 not working (no response) (August 2019)
Lights stuck on with Fibaro 223 Double Switch
Cannot reset Fibaro Relay FGS 212
Does the Fibaro 2 dimmer work?