Bullseye advancement can be made when using a non-arrow projectile, even though the description explicitly mentions arrows
Created Issue:
Bullseye Achievement when using non-arrow projectile
The new achievement, Bullseye, has the description "Hit the bullseye of a Target block with an arrow", however it can be triggered using snowballs.
Changed Description:
The new achievement, Bullseye, has the description "Hit the bullseye of a Target block with an arrow", however it can be triggered using snowballs. Was also able to trigger with eggs and tridents.
Changed Description:
The new achievement, Bullseye, has the description "Hit the bullseye of a Target block with an arrow", however it can be triggered using snowballs. Was also able to trigger with eggs and tridents.
Added Category: Advancements
Removed Category: (Unassigned)
Changed Summary:
BullseyeAchievement when using non-arrow projectileBullseye advancement when using non-arrow projectile
Changed Description:
Added Mojang Priority:
Important
Added Triaged Time:
Added Affects Versions: 20w16a
Changed Summary:
Bullseye advancement can be made when using a non-arrow projectile, even though the description explicitly mentions arrows

Still in 20w16a
I feel they should just change the advancement text instead of disallowing other projectiles
Should just change from "an arrow" to "a projectile"
Worth noting this was "fixed" by changing the description; other projectiles still work.