I turned on the Holliday creator feature to add a mod, but the shulker chests were broken. So I deleted the mod, but the shulker chests are still broken. So I made a new world, and added the Holiday Creator Features again, and the shulker chests are still broken. I can’t pick them up at all. They just break and don’t drop. When you break a shulker chest in creative with something in it, it drops the shulker with the item(s) inside. But I even switched myself to survival to pick it up with an iron picaxe and it didn’t drop anything. 

to recreate;

make a world, make it creative, turn on experimental Holiday Features, place a shulker chest, (I used purple, didnt check the other colors), place any item in it or don’t, break it in survival or creative. 

what should happen;

when you breaks it in survival or creative, it should drop the shulker with the items inside. 

What actually happened;

it broke. Didn’t drop Anything. Like breaking glass without silk touch.