diff --git a/subsys/net/ip/net_if.c b/subsys/net/ip/net_if.c
index 4c91f7b172118..f6a37a6a9c4f5 100644
--- a/subsys/net/ip/net_if.c
+++ b/subsys/net/ip/net_if.c
@@ -1562,7 +1562,11 @@ void net_if_start_rs(struct net_if *iface)
 		ipv6->rs_start = k_uptime_get_32();
 
 		k_mutex_lock(&lock, K_FOREVER);
+
+		/* Make sure that the RS timer is not in the list twice */
+		(void)sys_slist_find_and_remove(&active_rs_timers, &ipv6->rs_node);
 		sys_slist_append(&active_rs_timers, &ipv6->rs_node);
+
 		k_mutex_unlock(&lock);
 
 		/* FUTURE: use schedule, not reschedule. */
@@ -3383,6 +3387,8 @@ static void iface_ipv6_stop(struct net_if *iface)
 	IF_ENABLED(CONFIG_NET_IPV6_IID_STABLE, (ipv6->network_counter++));
 	IF_ENABLED(CONFIG_NET_IPV6_IID_STABLE, (ipv6->iid = NULL));
 
+	net_if_stop_rs(iface);
+
 	/* Remove all autoconf addresses */
 	ARRAY_FOR_EACH(ipv6->unicast, i) {
 		if (ipv6->unicast[i].is_used &&