Wan-Link Manager shows wan down, but in reality its up

I feel like I had a similar issue where the gateway appeared to always be down when it obviously wasn't. (Didn't have any indication of loss of packets dropped, though.) I can't remember the exact solution but it was something like changing a setting on the gateway, changing it back, then saving and suddenly it was up. Like a corruption in a setting somewhere. Sorry I can't remember the details.

My Solution was to hit SAVE again under Interface configuration.

hitting the save button also worked for me to get the interface green again

hitting the save button also worked for me to get the interface green again