Switch back to ethernet / prioritize over tethering? GL-MT2500 Brume 2

Routers
1

Running Brume 2 (v 4.7.4) as my main router. ISP connected to WAN port.
Multi-WAN failover: 4G modem connected via tethering using an RJ45 to USB via Brume 2 USB port.

If ISP fails, Brume 2 jumps to tethering. OK.
When ISP comes back up, the router doesn´t go back to ethernet unless manually turning off tethering.

I do have a Marble GL-B3000 which doesn't have this issue as a a LAN port is used (as WAN) as failover when ISP goes down. It does do automatic switching.

Setup:

screen_cap
screen_cap1156×894 35.5 KB

screen2
screen2828×892 30.6 KB

Imagen1
Imagen11012×1057 84.2 KB

20250618_193141
20250618_193141563×1263 117 KB

Is there a way to disengage tethering when the ISP (WAN port) comes back up?

Thanks,

3

Hi,
When Ethernet is restored and works stably for a period (the period depends on the sensitivity), it automatically switches back from tethering to Ethernet.
Multi-WAN - GL.iNet Router Docs 4

Did you manually create the USB modem interface in luci?

4

No, it was automatically created when I plugged in the USB-to-ethernet adapter