Hi together, today I managed to fix the problem. It was neither the FLX console nor my Artnet device. It was the Access point in between (TP-Link TL-WR802N). For some unknown reason the DHCP lease time was set to one minute, which is of course very short and shouldn't be that short. Setting it to a more reasonable time (like 120 minutes, which is the default) solved the problem. Just wanted to let you know if you may run into similar problems... Martin