default route lost upon adding new interface/static route/gateway

[giannisk]

Dear Forum,

I keep facing an issue on OPNsense 22.7.6
I'm building tunnels to my other sites (fortigate) everything works perfectly fine but what I've noticed is that while creating my new tunnels, whenever i edit an interface and press apply, or create a gateway and press apply, or create a static route and press apply, opnsense goes down because the default route is gone. I have to login to opn via cli and add the default route manually using route add -inet 0.0.0.0/0 -link -iface <interface_name>
I do not understand whats causing this, i search the forum and i see many people with default route being lost but nothing the same as my case

I only have 1 wan and no lan

If anyone faced this issue and knows a solution to it i would very much appreciate your input

Thanks in advance!

Regards
GK