"Not Today, Thank You" advancement can be earned even when the projectile was not deflected because not all the damage was blocked

The “Not Today, Thank You” advancement can be earned even when the projectile was not deflected because not all the damage was blocked (due to the presence of a custom blocks_attacks component).

To reproduce

1. /advancement revoke @s only minecraft:story/deflect_arrow

2. /give @s minecraft:shield[minecraft:blocks_attacks={damage_reductions:[{base:0,factor:0.9}]}]

3. /summon minecraft:skeleton ^ ^1 ^6

4. Switch to survival if you are not already in it

5. Immediately look towards the skeleton and block with your shield
   ❌ When the skeleton shoots you, you earn the “Not Today, Thank You” advancement, even though the arrow was not deflected but rather is now stuck inside you (as can be seen in third-person)

Expected behavior

Either the advancement could only be earned by actually deflecting the projectile (projectile deals no damage to you) or the description would say “Block” instead of “Deflect”.

Note

Attached video (currently invisible on the service desk due to META-212) shows this issue and MC-304697.