Piglins Turning Into Zombie Pigmen

Thank you for your report!
However, this issue has been closed as Working as Intended.

Piglins that somehow end up in the overworld become zombified fairly quickly

https://feedback.minecraft.net/hc/en-us/articles/360040975731-Minecraft-Beta-1-16-0-51-Xbox-One-Windows-10-Android-

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