Wireguard loses routes?

[djcenox]

I'm new to wireguard and found it extremely fast compared to ipsec. We had multiple site-to-site ipsec to connect every site, and sometimes phase2 tunnel died unexpectedly even in there was a ping constant.
Anyway wireguard works better but sometime i've found that: opnsense instead of using wg0 try to use WAN so the routing fail. A fast wireguard reboot and everthing back to work like a charm.

Should I assign and activate the wg0 interface (in the "Interface" section)? I've not done it, because there is already in the "Firewall" section, but maybe when the firewall refreshes the interfaces not founding the wg0 will brake the service?
Any tips?

Thanks.