Hi @AB2018 ,Are you looking for a way to extend the wireless medium with a mesh link? If so, does something like this implementation suffice? https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Extending_the_LAN_with_a_Wireless_Mesh_L...

Correct, you will notice that the MultiWAN backup document does talks about those pairs you've brought up here. MultiWAN backup uplink is a newer feature as well and is designed for having 3 WAN connections.

Since there is not a widespread reported issue, in this type of scenario it would be best to contact Meraki Support to conduct live troubleshooting of the behavior to determine what may have occurred during that time frame. The general Support number...