Edgerouter Load-balancing delete wan route after all path failed

Hello,

I use Edgerouter v.1.9.0

I have two WAN, and I want to failover only, not load balance.

When both links are down, and after a while, they came up again, the edge is not able to restore connectivity.

Both route are deleted due to the down status, but it seems to affect the loadbalance ping process.

Do you have an idea why ?

Is there any better method to implement failover WAN ?

Here is my config :

load-balance {
    group WAN_FAILOVER {
        interface eth1 {
            route {
                table 1
            }
            route-test {
                initial-delay 5
                interval 5
            }
        }
        interface eth2 {
            failover-only
            route {
                table 2
            }
            route-test {
                initial-delay 5
                interval 5
            }
        }
        lb-local enable
    }
}

protocols {
 static {
 table 1 {
 route 0.0.0.0/0 {
 next-hop 192.168.0.1 {
 }
 }
 }
 table 2 {
 route 0.0.0.0/0 {
 next-hop 192.168.3.1 {
 }
 }
 }
 }
}