it happened to me at leats twice now. I open up the game from the browser, since i play in mobile, and all worlds i downloaded and made from 0 are gone and the game loads in the "defaults".

Idk why happened, i was logged in. I want to know if someone knows what happen or at least knows a way to make a "backup" of your worlds without posting them, since worlds aren't shared between devices. So if i replicate the worlds and download them on pc, they are stuck in pc, they won't appear in my phone.