Status effects misbehave with faster clocks

Placed repeat command blocks with the commands
/effect @p regeneration 1 <0-4>

This causes the regeneration effect to be visually applied with particles and a flickering health bar, however it does not heal the player.

How to reproduce:
-In a minecraft 1.9 world, place a repeat command block and enter the above command, replacing "<0-4>" with a number from 0 to 4.

-type "/gamerule naturalRegeneration false"

-Apply damage to yourself in survival mode

• Notice the particles and movement on the health bar, but lack of health regen.

-Effects that fail to work include: Wither, Nausea, Regeneration, Health Boost, etc...