I found this bug while trying to save an existing family to move them into a new game.
When I use cheats (customzoi number) to save the existing Zoi as a Zoi preset, the screen is like this and nothing happens.
However, what’s strange is that if I repeat the process one more time (enter using cheats → exit → enter again), saving the zoi preset suddenly works. It seems like it only triggers properly on the second attempt.