Imagine, just when qEtoiles can finally go home (is Quasilada Island really a home, though?), aePhil can in some way see qPhil (maybe totally, maybe a silhouette... Anyway not only do my brain decided it was vibe it also choose brainrot)
WAIT, HOLD- HOLD ON, HELLO?? THIS????
After qEtoiles return to where he‘s supposed to be, everything seems to be okay. Etoiles feels relieved to be back with everyone and see that nothing much has happened ( besides his disappearance, and without going into too much about how he kind of misses aePhil & aeTechno eventually ) and it stays like that for a while.
qPhil starts seeing things. He‘s not sure if he‘s hallucinating it or not, but he sees a silhouette around him, watching him and eventually even talking to him.
Meanwhile aePhil has the same issue except much less often, but it still freaks him out.
Where I‘m going with this is.. what if upon qEtoiles return to his "home world", it also takes back certain data of the world where aePhil lives? Obviously Etoiles items he has from the Antarctic Empire doesn‘t get suddenly erased, so there would definitely still be ties between these worlds and it starts a whole different corruption.
So every time qPhil is asleep, he "dreams" about being a silhouette in the SMPEarth world and meanwhile the same happens with aePhil being a silhouette in the QSMP world.
It‘d be for me the most logical thing and also imagine the angst of when qEtoiles realises that the new data corruption is technically. his own fault.
