Zombie reinforcements don't spawn where the light level is 1 or higher

First, create following new world

• Game Mode: Creative
• Difficult: Hard
• Allow Cheats: ON
• World Type: Superflat ※Preset -> minecraft:air;minecraft:plains

Second, create field with this command

/fill -50 50 -50 50 50 50 quartz_block

Third, place lights with this command

/fill -50 51 -50 50 51 50 light[level=1]

4th, Set time to midnight

/time set midnight

5th, Summon a zombie with this command

/summon zombie ~ ~ ~ {IsBaby: 0b, Attributes: [{Base: 1.0d, Name: "minecraft:zombie.spawn_reinforcements"}]}

Last, punch the zombie several times.

Expectation: A zombie reinforcement spawn.

Result: Zombie reinforcement don't spawn.