The Bug:

Entity names aren't affected by the blindness or darkness effects if they're behind blocks or entities.

Steps to Reproduce:

1. Begin facing a certain direction by using the command provided below.

   /tp @s ~ ~ ~ -90 0

2. Summon a husk in front of you that has a name and give yourself the blindness effect by using the commands provided below.

   /summon minecraft:husk ~7 ~ ~ {CustomName:"\"MC-239810\"",CustomNameVisible:1b,NoAI:1b,Silent:1b}

   /effect give @s minecraft:blindness 999999 1 true

3. Take note of how you correctly aren't able to see the husk's name.
4. Summon a wall of blocks between you and the husk by using the command provided below.

   /fill ~6 ~ ~6 ~6 ~4 ~-6 minecraft:stone

5. Take note as to whether or not entity names are affected by the blindness or darkness effects if they're behind blocks or entities.

Observed Behavior:

Entity names aren't affected by the blindness or darkness effects if they're behind blocks or entities.

Expected Behavior:

Entity names would be affected by the blindness or darkness effects if they're behind blocks or entities.