Reducing max health using /attribute does not reduce current health

Summary:

Using /attribute to change minecraft:generic.max_health base value to a value lower than the Health value does not reduce the Health value as would be expected.

Repo Steps:

Create a new world and run:

/attribute @s minecraft:generic.max_health base set 1

Expected Result:

Only 1, half-filled heart container visible.

Actual Result:

Only 1, fully filled heart container visible.

Verifying:

Running the following will show a value of 20.0f:

/data get entity @s Health