Adult zombified piglin's skull texture does not separate from the skin texture, not as old zombie pigman texture, which those was separated.
Baby zombified piglin should not have skin texture, just like the old zombie pigman, however, they do.
Details in the picture.
This might not be a bug, more like a suggestion.
[media][media][media]
Thank you for your report!
However this is a Duplicate of MC-173366.
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