Shadow and lunar merm max health are inconsistent

(I use a server mod called Insight to show merm health)

A shadow merm has 500 max health when a merm king exists. 

After the merm king is dead and we make a new king, shadow merm now has 560 max health. 

(change from 500 to 560 max health, both with merm king buff) (560 = normal merm max health with merm buff)

This is because the function that applies merm king buff affect lunar and shadow merms without taking into consideration of their specific max health.

This issue happens to shadow/lunar merms and lunar merm gurads.