I changed the world's random tick speed to 1000000 in an attempt to make vines grow faster. It seemed like nothing was happening, but once I left and rejoined everything after that moment disappeared from the world and the vines were fully grown. Every time I leave the world it gives me a really long "Saving World" screen without saving anything.
I've tried looking through the files but I haven't found anything that looks like game rules.
I made a copy of the world and tried to join that one with no difference. I tried joining the world and changing the random tick speed but that doesn't change anything.
How can I fix this?