We can only submit a buffer if we have one already

src/server/frontend_wayland/wl_surface.cpp

@@ -410,15 +410,15 @@ void mf::WlSurface::commit(WlSurfaceState const& state)
                     current_buffer->id().as_value());
             }
 
-            needs_buffer_submission = true;
+            needs_buffer_submission = current_buffer;
         }
     }
     else
     {
         frame_callback_executor->spawn(std::move(executor_send_frame_callbacks));
     }
 
-    if (needs_buffer_submission)
+    if (needs_buffer_submission && current_buffer)
     {
         geom::Size logical_size;
         geom::RectangleD src_sample;