I was playing Minecraft with my friends and then we went end city haunting then we find a end city with more then one shulker in the same block how to get this replicate go on this seed -1139459197 go to the end and then go to -1212 61 1998

it appears different amount spawn in the same block I when I was testing to see if the bug would happen on my phone instead of my ps4 instead of 3 being in same block their were 2