[MC-85544] Equipment data tag no longer working on mobs

Mod edit

The equipment tag no longer exists.
Use

/summon Entity ~ ~ ~ {HandItems:[0:{...},1:{...}],ArmorItems:[0:{...},1:{...},2:{...},3:{...}]}

I tried doing

/summon Skeleton ~ ~ ~ {Equipment:[{},{},{},{},{id:diamond_helmet}]}

For my map, there was no equipment.
Either the tag changed and i don't know about it or this is a bug.

Linked issues

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There are two new tags:

/summon Skeleton ~ ~ ~ {ArmorItems:[{...},{...},{...},{...}],HandItems:[{...},{...}]}

(Order: "ArmorItems": feet, legs, chest, head | "HandItems": main hand, off hand)

I want the old data tag back too. It made my creation incompatible with 1.9 ):

After doing some research, I found out that this is the correct way:

/summon Entity ~ ~ ~ {HandItems:[0:{...},1:{...}],ArmorItems:[0:{...},1:{...},2:{...},3:{...}]}