Nucleus+ is visible on network only via USB-Ethernet adapter

Dear Sergey
I’m afraid that I repeat the fault, described in my previous topic ( Reset Roon Nucleus+ without web interface when I changed 192.168.1.71 to 192.168.1.81 and web interface was disappeared.
I started to experiment to solve the problem when I couldn’t access to Nucleus+ with LAN connection in HiFi zone. Firstly I used static IP. Secondly I knew about Ethernet-USB adapter, which helps me to see Nucleus+ in HiFi zone. Now I want connect it in proper way via the LAN, not via SET