You can try to make a FlxText which removes the first line when it's off-screen and gradually adds new lines instead of showing all of them at once.

Also show a piece of code or images of the problem you're facing. It's kinda hard for me to make it out of texts.

@Gama11 damn, it works!

Thanks <3! A lot of my students were having this problem and didn't know how to fix it.

So I decided to use just substates instead since this is a really complicated bug. It also somehow crashes the game when I set the camera zoom :/