Published world is broken, but "Preview" works?

So I have this issue now where the public version of my world is broken--the certain triggers don't work and objects don't show up. But if I click on the options for the world on mobile, I see a "Preview Version" that when I click that it works. What is this "preview version" and how can I make it the public version? No matter how many times I click publish, the public version is still broken in ways the "Preview Version" isn't.