sorry but there had been a misunderstanding.
the shulkers transmogged into sand didn't actually transform, someone put sand shulkers in the gunpowder box and I didn't look when I took them out
I am using 1.16.200, and it affects only overworld blocks.
HERE a video of it happening
Due to Villagers not offering any Cursed books, it means that the most realistic way that you'd be guaranteed a curse book is through fishing - with an approximate 0.043% chance of fishing up either a curse of binding or vanisihing book. - ~2312 items fished up. That would mean a rough average of around 10 hours of non-stop fishing for your best chance at a Cursed Book.
After Caves and Cliffs part one updated, Minecraft has crashed my PC from taking too many resources as well.