When you break chest with /fill - - - - - - air 0 destroy and place some blocks where the chests was the model of the chest appears above the blocks.

Steps to Reproduce:
1.- Make a large line of chest and trapped chests (Like a you're making a storage room)
2.- with /fill command destroy the chests.
3.- Place some blocks (Like a furnace, flower pot, brewing stand, hopper, shulker box, etc) where the chest was
4.- Enjoy

(This effects dissapears when you reload the world but no if you reload the chunks)