it's not a duplicate!I'm very sure about that this glitch doesn't happen in 1.19.2
this is the circumstance in 1.19.2
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this is the glitch in 23w07a
you can clearly see I can dive down normally in 1.19.2 but not in 23w07a
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I think it got stuck
maybe it was trying to track something but just couldn't reach the target,so it got stuck at here and didn't despawn.
can confirm in 1.20 rc 1