diff --git a/src/modules/module-client-node/remote-node.c b/src/modules/module-client-node/remote-node.c
index 0d8791116..b3a13d2d0 100644
--- a/src/modules/module-client-node/remote-node.c
+++ b/src/modules/module-client-node/remote-node.c
@@ -938,6 +938,9 @@ static void clear_mix(struct node_data *data, struct mix *mix)
 {
 	pw_log_debug("port %p: mix clear %d.%d", mix->port, mix->port->port_id, mix->mix_id);
 
+	spa_node_port_set_io(mix->port->mix, mix->mix.port.direction,
+			mix->mix.port.port_id, SPA_IO_Buffers, NULL, 0);
+
 	spa_list_remove(&mix->link);
 
 	clear_buffers(data, mix);
diff --git a/src/pipewire/impl-link.c b/src/pipewire/impl-link.c
index 01707cd8d..10ae675d8 100644
--- a/src/pipewire/impl-link.c
+++ b/src/pipewire/impl-link.c
@@ -664,8 +664,11 @@ int pw_impl_link_activate(struct pw_impl_link *this)
 		return res;
 
 	if ((res = port_set_io(this, this->output, SPA_IO_Buffers, this->io,
-			sizeof(struct spa_io_buffers), &this->rt.out_mix)) < 0)
+			sizeof(struct spa_io_buffers), &this->rt.out_mix)) < 0) {
+		port_set_io(this, this->input, SPA_IO_Buffers, NULL, 0,
+				&this->rt.in_mix);
 		return res;
+	}
 
 	pw_loop_invoke(this->output->node->data_loop,
 	       do_activate_link, SPA_ID_INVALID, NULL, 0, false, this);