Put the summary of the bug you're having here
What I expected to happen was...:
I expected the shield to block the effects from the potion arrows, because the arrow doesn't hit you but is blocked by the shield.
What actually happened was...:
I blocked the arrow with my shield, but still got the effect of it.
Steps to Reproduce:
Just grab a shield and a friend and let him shoot you with all kinds of arrows.
Linked issues
Comments 2
Duplicate of MC-86344 – If you searched the tracker before creating this report, and were unable to find the indicated ticket, please comment with the keywords you searched for so that the original report can be improved.
Pretty sure that's how it's supposed to work. The effect is applied before the damage is calculated. It's just like shooting an enderman with a spectral arrow. They get the glow effect, but don't take damage.