DMX proxy does not work


I’m trying to get the DMX proxy universe to work.
The DMX output is working when I’m using the WLED interface so that part is fine.

Now I want to activate the DMX proxy universe so I changed the value from “0” to “2” in the hope that received ARTNET DMX data is set on the DMX output of mu WLED module (ESP-12F).

The DMX input (in the Sync interfaces) is set to Art-Net and the start universe is set to 2.
When I now send some data over Art-Net this is working for a very short time and then my DMX light goes OFF.

When I then go back the the “DMX output” tab, the “Proxy universe” setting is back to “0”???

What is going wrong?