Automatic switch to Ethernet when an external router is connected.

Hi,
During a live show, the internal WiFi of my CQ‑20B got completely saturated and I couldn’t access the network menu anymore — so I couldn’t switch to my external router and temporarily lost control of the mixer.
A simple solution would be: if an external router is connected via Ethernet, the CQ should automatically switch to it, or at least offer a “Force Ethernet” option that stays available even when WiFi is overloaded.
This would greatly improve reliability in real live situations.
Has anyone else experienced this?

Thanks.