CARB and Multiwan failover not working

[dennisbbb]

I have redundancy with two pfsense (Primary Master and Secondary Master/Backup) using CARP and they work flawlessly in failover.
I also have MultiWAN and both WAN1 and WAN2 switch flawlessly while running off Primary Master.

Here's the issue:

When failover to Secondary Master, WAN1 continues to work great. But when WAN1 fails, Secondary Master does not know to switch to WAN2, unless I reboot WAN2 router.

Is this normal arp issue with isp router because CARP failover does not include transferring over arp mapping?