if your friend can’t get a plot open, please let me know because i can get one open today and then give him back to you. i cycle a lot.
there’s a way to make sure you don’t get the glitch: you have to talk to the villager after you invite them to your island, if they mention moving to your island again, there’s no glitch. if you can invite them to move in again, they’re glitched and you can force close the game which won’t save it, and then visit the island and invite him again.
i know how much a villager can mean to you, i’ve cried when i got raymond and audie and i get so excited to talk to them every day

let me know, i don’t want you to lose him and waste tickets.