The Bug:

Some particles defy the ambient lighting and glow in dark... but, for some reason, not the lava ones... especially considering that lava is brighter than crying obsidian, but tears are actually glowing and lava drops do not.

Steps to Reproduce:

1. Summon two command blocks, one of which summons dripping lava particles and the other that summons dripping obsidian tear particles by using the command provided below.

   /setblock ~3 ~ ~3 minecraft:repeating_command_block{Command:"particle minecraft:dripping_lava ~ ~3 ~ 1 1 1 1 1 force",auto:1b}

   /setblock ~-3 ~ ~3 minecraft:repeating_command_block{Command:"particle minecraft:dripping_obsidian_tear ~ ~3 ~ 1 1 1 1 1 force",auto:1b}

2. Set the time to "midnight" and give yourself the darkness effect by using the commands provided below.

   /time set midnight

   /effect give @s minecraft:darkness 999 0 true

3. Ensure that the "Darkness Pulsing" option is set to "100%" in your accessibility settings.
4. Watch both types of particles closely at the darkness effects pulsates.
5. Take note of how the dripping obsidian tear particles glow in the dark, but the dripping lava particles do not.

Observed Behavior:

Lava particles don't glow.

Expected Behavior:

Lava particles would glow.

Code Analysis:

Code analysis by Apollo30 can be found in this comment.