I've run into a horrible issue today, so I wanted to report this here and ask if anyone else had this as well. So, I've just entered my world, when I hear an insanely loud digging noise, then a serie of clicks. Then, when the screen finally shown, I've got tons of achievements (just all of them got reset for some reason, but that's not the main issue), and I noticed the garden biome from Cosmetic Variety was gone entirely, trees were floating over a huge hole in the ground. I thought that a mod just glitched itself out (maybe it turned off for some reason), but actually no - after checking enabled mods, I went into the world again, and then, after going around the world, I noticed that literally everything, that was modded, was gone - biomes, ores, etc. What's even more awkward is the fact that I've had a backup of the world made yesterday, and when I quit the world and copied the backup into the files, nothing has changed, modded stuff was still gone. It's quite a big BS, has anyone run into this issue too?
EDIT: I've just noticed that it actually made playing in this world, with this character close to impossible, because my whole Magic Storage is gone. Sweet.