Instant Health 124+ doesn't work

The Bug:

Instant Health 124+ will not do anything.

Steps to Reproduce:

Use this command first:

/effect give @s minecraft:health_boost infinite 255 

Then use this command to give effect:

/effect give @s minecraft:instant_health 100 125

Observed Behavior:

It doesn't do anything.

Expected Behavior:

It fills all the hearts quickly