Gateway going periodically offline

[FredFresh]

I have a 3 vpn wireguard setup to be used as fail over: vpn1, vpn2, vpn3, wan.
To achive this I used the road warrior setup for Proton, butthe routing to the VPN gateways is done using the priority of the gateways vpn1 (priority 1), vpn2 (2), etc...

Everything is properly working aside that periodically (without an apparent trigger) one or more of the VPN gateways are marked as offline even if the relative peer is online.

The only way to bring back online the gateway is to perform a traceroute from my pc or from opnsense to the gateway ip.

I already creaate a CRON rule for Renew DNS for Wireguard on stale connections.

Looking to the wireguard LOG I am not able to identify anything strange. Please can you suggest where should I look for hint to solve this point?

[FredFresh]

Hi,

any sugestion on this? In order to identify and analyze this issue, which log should I check? On the wireguard LOG it seems there ano useful info.

Thanks.