I've just noticed that while roaming the nether, every time a baby Piglin tries to jump into a one high block space, they take what I assume is suffocation damage and then are fine when they get into the space.
To reproduce, just get a one high space and let a baby Piglin walk into it.
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However, we are already tracking this issue, and this report is a Duplicate of MC-163673, which is a report that has not been resolved yet.
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