Fix ping simulation

rust/src/net/network_manager.rs

@@ -269,7 +269,9 @@ impl NetworkManager {
             );
             let peer = Peer::listen(
                 None,
-                PeerConfig::default().with_identifier(NetworkManager::identifier()),
+                PeerConfig::default()
+                    .with_identifier(NetworkManager::identifier())
+                    .with_additional_ping(Duration::from_millis(100)),
             );
             match peer {
                 Ok(mut peer) => {