I can confirm this as well. The following call with fails. Note the url below is used by the netatmo script to update the value.

http://192.168.178.31:8080/json.htm?type=command&param=udevice&hid=8&did=1411D&dunit=1&dtype=80&dsubtype=10&svalue=21.2
{
status: "ERR"
}

the following is successfull ...