Player.setHealthScale() is not working properly.
was working in spigot 1.8

It works at first, but after getting a health update it breaks.
the max health works, but the actual health doesn't

example: healthscale is set to 20. the players maxhealth and health are both set to 1.
after updating the players health will change to 1/2 heart (1hp), but the max health will be correctly displayed at 10 hearts (20hp).