The bug
When breaking a mob head the particle effects that come off it are those of soul sand. Also when breaking a beacon block the particles that come off it is those of a diamond block. When throwing a splash potion the particles that come off it is those of a normal potion.
When breaking any of the following, particles also are displayed wrong, they don't display the particle of a block broken but instead of a different similar block:
chests(WAI: MC-2614)waterlavastanding_sign
wall_sign
standing_banner
wall_banner
piston [extended: true]heads & skulls
brewing_stand [has_bottle: false]
enchanting_table
anvil [damage: >0]
flower_pot (no dirt particles, only show top particles)
tripwire_hook
sea pickle (not waterlogged)
top of double plants (breaking, not completely destroying (sword in creative)) (MC-29590)cauldron (dark blue particles, obsidian?) MC-132734
Can confirm.