Tuya motion sensor only partially working

Hello,

I have a Tuya motion sensor (Kruidvat) integrated using the “official” integration.

In HA the tamper alarm (device_class: tamper) changes state as expected when I open/close the sensor.

But the motion (device_class: motion) in HA is constantly on, while it does change state in the app and the iot cloud. So the motion is correctly detected and sent to the cloud, but does not arrive in HA.

I don’t understand why the tamper alarm is shown in HA, but not the motion detection ?

Am I missing something obvious here ?
TIA