Wrong temperature with Qubino Flush Dimmer ZMNHDD

Hi. This is my first post here, if there is any info missing, please let me know.
I am in the process of converting my entire smart home from Domoticz to Home Assistant.
HA is running on an Intel NUC, but my Z-Wave HUB is running on a Raspi 3 with Razberry 7 Pro controller and HA with Z-Wave JS installed. So far this is working fine.
But now I have a problem with a Qubino Flush Dimmer Plus, to which the corresponding temperature sensor is connected. The question is whether this is an HA problem or, what I suspect, more of a Z-Wave JS problem.
The problem is, as soon as the measured temperature rises above 25.4°C, I suddenly get the temperature reported minus 25.5°C, so at a measured temperature of 25.5°C I get 0°C reported, then at 25.6°C I get 0.1°C reported, and so on.
If I do a manual refresh in the UI of Z-Wave JS at the multilevel sensor, I get the correct temperature reported. But with the next automatic report I get again the wrong temperature.
Does anyone have an idea where the problem could be?
Thanks for the feedback and best regards

    {
      "time": "2023-09-21T09:30:48.659Z",
      "event": "value updated",
      "args": [
        {
          "commandClassName": "Multilevel Sensor",
          "commandClass": 49,
          "property": "Air temperature",
          "endpoint": 0,
          "newValue": 25.2,
          "prevValue": 25,
          "propertyName": "Air temperature"
        }
      ]
    },
    {
      "time": "2023-09-21T09:54:45.796Z",
      "event": "value updated",
      "args": [
        {
          "commandClassName": "Multilevel Sensor",
          "commandClass": 49,
          "property": "Air temperature",
          "endpoint": 0,
          "newValue": 25.4,
          "prevValue": 25.2,
          "propertyName": "Air temperature"
        }
      ]
    },
    {
      "time": "2023-09-21T10:27:48.511Z",
      "event": "value updated",
      "args": [
        {
          "commandClassName": "Multilevel Sensor",
          "commandClass": 49,
          "property": "Air temperature",
          "endpoint": 0,
          "newValue": 0,
          "prevValue": 25.4,
          "propertyName": "Air temperature"
        }
      ]
    },
    {
      "time": "2023-09-21T10:45:11.226Z",
      "event": "value updated",
      "args": [
        {
          "commandClassName": "Multilevel Sensor",
          "commandClass": 49,
          "property": "Air temperature",
          "endpoint": 0,
          "newValue": 0.2,
          "prevValue": 0,
          "propertyName": "Air temperature"
        }
      ]
    },
    {
      "time": "2023-09-21T11:13:14.044Z",
      "event": "value updated",
      "args": [
        {
          "commandClassName": "Multilevel Sensor",
          "commandClass": 49,
          "property": "Air temperature",
          "endpoint": 0,
          "newValue": 0.4,
          "prevValue": 0.2,
          "propertyName": "Air temperature"
        }
      ]
    },