I am always suspicious of the half-sister's declaration that JiHo is involved in the scheme. Perhaps JiHo had found MC, but she was already dead, and maybe he was even the one who turned back time. That was why he was agitated that Nadia gave the wreath to Glenn.
There's this manga called This Time I Will Definitely Be Happy (a definite read) where the FeMC remembered her past lives and that the hero had always been her lover/mutual understanding with each other, but when the hero goes on the journey and then returns tied to someone else
(but this turned out not true). Later it was revealed that further past the previous reincarnations, the FeMC were imprisoned and killed and the hero found her already beyond saving and was in despair. And it was always the culprits saying that the hero abandoned her.
So, unless it was JiHo who said it himself, am not gonna believe a thing that witch says.