>>535485874
I think the idea is more so, Dante wished to learn more about Xichun, and some stuff related to what happened in their own world. The intricacies of what made this Ishmael be born in this life, and possibility, and never having been to the lake prior to searching for the traces to have a gift representing immortality, they're not important because why would you care what lead her to be in this life? It's just another possibility out of infinity.
But since the focus point of the mirror world had them talk about the unimportant stuff in detail, the stability of the mirror world became fucked and you basically had to wait for the image to reboot so the dialogue stops being censored.
So it's not that he created a world, the ID just focused on someone Dante wished to learn more about, so an ID based on that person was acquired, but the person chosen for the ID has way less to do with the original Ishmael the tech is using to get stuff for, so the details about the why or how of it become more unstable.
Hong Lu is just a "what if he didn't just cower in fear of being hurt again?" so there's no instability, as it's a close possibility to the original.