Zwave temperature sensor is freezing

Hi!
I have a FIBARO System FGMS001-ZW5 Motion Sensor connected to my Hass.io. Everything works well, but after a few minutes the temperature from the FIBARO System FGMS001-ZW5 Motion Sensor seems to freeze.
The old temperature value still exist. The luminance sensor and motion detection works well. Only the temperature is freezing.
Has someone an idea why?
Thanks for your help