Not sure. Maybe because of this place? It's strange that they pulled it here at all, but I didn't think twice because Umbra was already with me. I don't see why being here would let it appear to other people, but... who knows. Messengers are as mysterious as the Astrals sometimes.

[Or worse, mostly because the Messengers are conveying actual understandable words instead of bizarre hallucinations and dead languages.]

Could be Carbuncle just decided it's okay, here.