Oups sorry, was on bad topic (a pairing issue on another one)
And BTW what is your OS/hardware ?
Raspbian Linux 10 (buster) with conbee 2 as coordinator
For me, can be OS issue, deconz don’t use same database file for exemple for both version.
If you take a look in the GUI when your device are not working, how is the device name 0xXXXX or a real name ?