Hi,
i use at my wireguard 'server' ndp_proxy to announce - thats the reason
why i could use the same interface address subnet, then the endpoint is in.

Example client configuration:

[Interface]
Address = 2a01:1337::3/64

[Peer]
AllowedIPs = 0.0.0.0/0,::/0
PersistentKeepalive = 25
Endpoint = [2a01:1337::2]:48574


Is there a solution for this 'bug' - there should be a validation and
exclude of endpoint addresses on the routing table fwmark

A nice day
 Geno