Does Webb image of Jupiter show rock debris where giant ET Motherships are parked?

On July 12, NASA held an international live stream releasing the first official images from the James Webb Space Telescope showing distant exoplanets, galaxies, nebula, and a glimpse deep into our universe. The next day, NASA stealthily released an image of Jupiter taken by the Webb Telescope, which showed a noticeable dark field just above the gas giant's atmosphere. Was it a shadow, as NASA appeared to claim, or something entirely different – part of a newly arrived extraterrestrial space fleet secretly parked around Jupiter?