It might be a miscalculation of orbital body models, which has happened before. Urbain Le Verrier was able to predict Neptune's existence. Then he tried to predict a planet between Mercury and the Sun, because the current Newtonian physics wasn't lining up to observations, a similar situation to how Neptune was found. Then Einstein's work on gravity modeled the orbital bodies more accurately, ending the debate if there was another planet closer to the sun than Mercury. Just a different food-for-thought point of view, as I don't know what the answer is obviously.