When using the piercing enchantment on a crossbow, it will not penetrate skulkers that are closed.
In my opinion making the crossbow a direct downgrade for the majority of situations.
Comments 4
No projectile, whether it is shot from a crossbow, bow or just snowballs, can hit a shulker when it is closed. This is WAI. If you believe this should be in the game, head over to r/MinecraftSuggestions (I think? look it up).
Yes shulkers are closed they reflect arrows but only when they are closed, open they don't. That being said even with them open I was unable to reproduce.
Thank you for your report!
However, this is a suggestion. This might just have been a small oversight on the devs' part.
Please head over to the feedback site to suggest features, this forum is for bug reports only.
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As far as I know, shulkers that are closed are supposed to deflect arrows and therefore cannot take any damage from arrows at all.