Player Head Component "minecraft:profile={name:""} is too restrictive requiring no spaces/special characters and/or a character limit of 0-16. This bricks old player heads that have these use cases in the name field by stripping profile components completely.
This is typically used to keep the custom item name for a head where a player sets a custom value like `Spider` would display "Spider's Head" that would persist when placed down when they already have a custom texture.
How to Replicate:
+Working:
+
/give @s minecraft:player_head[minecraft:profile={name:"test"}]+Not Working:
+
/give @s minecraft:player_head[minecraft:profile={name:"test test"}]/give @s minecraft:player_head[minecraft:profile={name:"testtesttesttesttest"}]/give @s minecraft:player_head[minecraft:profile={name:"test☺"}]
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This is WAI, but we have increased the prio of MC-174496 🙂
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
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I'd strongly urge that MC-174496 be fixed before 1.20.5 and that player heads with the name field having incorrect datasets be datafixed with "'s Head" appended to the end. If not this is a massive breaking change for many maps & datapacks that updating will break existing worlds with little to no workaround.
If this is breaking a world save from before 1.20.5, I'd recommend creating a new bug report, and providing a 1.20.4 world save that breaks or has issues when being upgraded to 1.20.5. This bug report focuses only on the behaviour in the current snapshot with the new command syntax, but not the world upgrade path.
Edit: There's now MC-268898
Worth noting this is typically used instead of Item Name because MC-174496 causes item names to disappear when broken/placed.