I swear, I always get voided villagers moved into empty slots the very next day. I've also encountered my own voided villagers on islands (and of course, none of the dreamies I'm searching for). A plot is never open for more than a day; a voided villager from a friend (or a rando I traded with) has plopped themselves down in it.I'm not happy with villagers hunts and picking up void villagers. Nintendo should do a better job with testing.
A couple of weeks ago Tammi finally moved out. Started island hopping and everything was going well until I visited Island 17. Tammi was there. Kept hunting and decided to let the game pick a villager. The random villager was Freya from my 2nd island. Freya moved out 2 months ago and my 2nd island visited to clear the void right away. Why do full Island gets stuck with other players voids?
In ACNL players with a villager void visited a full Town to clear the void. The full town never got stuck with the void. If Nintendo wants to sell more consoles it should work like ACNL.