Just testing the shulker bullet duplication in the snapshot 20w45a, and just trying to get a shulker spawn egg found this shulker box visual glitch. : r/Minecraft
Minecraft 1.14.2- ALL WORKING DUPLICATION GLITCHES 2020 TUTORIAL! XBOX,PE,PC,SWITCH,PS4 - YouTube
MC-131965] A duplication glitch with shulker box ans enderchest. - Jira