ThinOS sends NetBIOS name query

Hello,

most of our Wyse5070 run Windows 10 IoT, but some run ThinOS.

By listening the network via wireshark I found NetBIOS name query  packets sent by the ThinOS machines.

Strangely the query contains NO%20SERVER<20>.

Does anyone know why ThinOS sends this packets and if there is a way to disable them?

We have non WINS Server running

Greetings

Andreas