arrange monitor after updating fullscreen background and lock surfaces

dwl.c

@@ -2476,10 +2476,6 @@ updatemons(struct wl_listener *listener, void *data)
 		wlr_output_layout_get_box(output_layout, m->wlr_output, &(m->m));
 		wlr_output_layout_get_box(output_layout, m->wlr_output, &(m->w));
 		wlr_scene_output_set_position(m->scene_output, m->m.x, m->m.y);
-		/* Calculate the effective monitor geometry to use for clients */
-		arrangelayers(m);
-		/* Don't move clients to the left output when plugging monitors */
-		arrange(m);
 
 		wlr_scene_node_set_position(&m->fullscreen_bg->node, m->m.x, m->m.y);
 		wlr_scene_rect_set_size(m->fullscreen_bg, m->m.width, m->m.height);
@@ -2491,6 +2487,11 @@ updatemons(struct wl_listener *listener, void *data)
 					m->m.height);
 		}
 
+		/* Calculate the effective monitor geometry to use for clients */
+		arrangelayers(m);
+		/* Don't move clients to the left output when plugging monitors */
+		arrange(m);
+
 		config_head->state.enabled = 1;
 		config_head->state.mode = m->wlr_output->current_mode;
 		config_head->state.x = m->m.x;