Mobs summoned by the player with equipment continue to render the item if it's removed via command in the same tick

Mobs summoned by the player with the summon command with equipment continue to render the item if it's removed via command in the same tick.

Steps to reproduce:

• place a command block with the command:

  /item replace entity @e[type=minecraft:zombie] weapon.mainhand with minecraft:air
  

  and set it to Repeat and Always Active
   

• place a second command block with the command:

  /summon minecraft:zombie ~ ~1 ~ {HandItems: [{id: "minecraft:diamond", Count: 1b}], NoAI: 1b}

• Activate the second command block with redstone

-> The diamond in the zombie's hand disappears as soon as the zombie spawns

• Run the same command from the second command block as player

-> The diamond is still rendered despite being removed from the zombie's hand (Check with /data get)

• Relog

-> The diamond is no longer rendered