diff --git a/internal/client/index.go b/internal/client/index.go
index c6a17cb3703..a7f36c482c7 100644
--- a/internal/client/index.go
+++ b/internal/client/index.go
@@ -192,6 +192,8 @@ func (ci *Index) Find(id string) (c *Persistent, ok bool) {
 
 // find finds persistent client by IP address.
 func (ci *Index) findByIP(ip netip.Addr) (c *Persistent, found bool) {
+	ip = ip.WithZone("")
+
 	uid, found := ci.ipToUID[ip]
 	if found {
 		return ci.uidToClient[uid], true
diff --git a/internal/client/persistent.go b/internal/client/persistent.go
index 06e346f4dfc..8345f41896a 100644
--- a/internal/client/persistent.go
+++ b/internal/client/persistent.go
@@ -161,7 +161,7 @@ func (c *Persistent) setID(id string) (err error) {
 
 	var ip netip.Addr
 	if ip, err = netip.ParseAddr(id); err == nil {
-		c.IPs = append(c.IPs, ip)
+		c.IPs = append(c.IPs, ip.WithZone(""))
 
 		return nil
 	}