The "below_name" scoreboard display slot doesn't work with non-player entities

The Bug:

The "below_name" scoreboard display slot doesn't work with non-player entities.

Steps to Reproduce:

1. Create a dummy scoreboard objective and set it to display below entity names by using the commands provided below.

   /scoreboard objectives add MC-99647 dummy

   /scoreboard objectives setdisplay below_name MC-99647

2. Summon an entity that has its custom name visible and assign a value of the dummy scoreboard to it by using the commands provided below.

   /summon minecraft:armor_stand ~ ~ ~ {NoGravity:1b,CustomName:"\"Test\"",CustomNameVisible:1b}

   /scoreboard players set @e[type=minecraft:armor_stand,limit=1,sort=nearest] MC-99647 100

3. Look below the name of the armor stand.

Observed Behavior:

The "below_name" scoreboard display slot doesn't work with non-player entities.

Expected Behavior:

The "below_name" scoreboard display slot would work with non-player entities.