Staircase crush

I have a problem with a double staircase to the hatch in the ceiling. The ceiling is high, so I need two sections of the stairs. But it is necessary to leave the game and then re-enter - one of the sections breaks. Always!

My apologies for my bad English… :blush:

https://drive.google.com/file/d/1uX-dwUPjmUc8s3shEer6Dv8Kjafn6Hec/view?usp=sharing