Parts behave strange





(Game link above so you can see it for yourself)

So I’m currently trying to make a train game, but came across a problem today. As I wanted to test a new wagon I made, studio didn’t respond to me clicking on the play button. When clicked on the play button it just showed Never-ending air. Now I tried joining the game by publishing it and joining it by Roblox. It took longer as usual to load in and once loaded in I found out that some models were missing. Those that remained were unable to move anymore (Locomotives). Also the track and rails were domino looking moved on a different way (Shown above). This problem occured today after I created one wagon. Is there anyone that knows how to fix this?

Are the rails anchored? They should be anchored so they could stay in their place.

they are yes, but dont worry. I got the model out of it and now making a new version which isnt bugged