Failover not switching back to WAN1
I was 2 difference ISPs and their routers. I set up failover on pfSense via (Tier 1 & Tier 2 w/member down). However, when WAN1 is down it switches to WAN2 but when WAN1 is up again, it doesnt switch back to WAN2.
Question: is that a glitch/bug? Is there an alternative? What can be wrong?