Ledvance Smart+ Motion Sensor: no motion seen in Phoscon

I’m using the deconz-system and Ledvance Smart+ Motion Sensos for some years without any problems.

I’ve done an upgrade to Phoscon-Version 2.20.01 / 19.9.2022 (the firmware is 26720700).
Then the following problem occurs:

The pairing of a new Ledvance Smart+Motion Sensor works well.

In case of detection a motion (green light), Phoscon doesn’t change the motion indicator.
Interesting is that the values for battery and temperature are regulary updated.

I’ve tested it with three new sensors to exclude, that it is a hardware-failure.

How can i solve this problem.