EDIT: Forget it. My issue has gone away.
----
Hi,
When I unplug my WAN2 modem, the gateway is not only marked as "offline", but it is completely disabled.
I suspect that is why my multi-WAN is not working properly.
(https://i.postimg.cc/dtKtLqcF/Unbenannt.png) (https://postimages.org/)
Greetings
Jens
Had the same problem and had to disable gateway monitoring.