The Happy Ghast suffocates and disappears when saving the world or leaving it in rooms with corners

The Happy Gasth has problems, in my Survival game 3 Happy Gasth have already died, one with a tag that was tied up and apparently only disappeared when saving and leaving the game repeatedly and 2 that managed to suffocate by being in a closed room, I tried to keep it out of the game simulation area to avoid the problem of them disappearing but when I get close the Happy Gasth moves and quickly suffocates for no reason.

It is also worth highlighting the very poor AI it has, moving away from the player more than necessary and easily getting caught between blocks despite being tied up.