Poppy on copper golem's head is wrong render

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Thank you for your report!
However, this issue is Working As Intended.

The behavior you have reported is working as intended: Please refer to the 25w35a changelog, which is quoted below.

The Copper Golem now uses the Saddle equipment slot for blocks placed atop of its Lightning Rod

• Its Head equipment slot will now function like a regular head slot, akin to its functionality for humanoid mobs

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Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.

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