Zigbee network (partly) unreachable after latest update

Who can help me with the following issue?
After using the deconz addon in HA for almost a year without any problems, this night it all stopped working. Somewhere in the middelde of the night all devices and switches are unresponsible / offline.
Sometimes a temperature sensor actually reports a reading and also my smart radiator valve (the most far way from my Conbee stick) is acting normal.

Could this have anything todo with the resent update of the deconz zigbee add on in HA?