[Someone]

Firespitters are receiving fire damage when hit by planets in black doors. Unsure if intentional.

Code:

Firespitter takes 49 Fire damage.

[Neus]

I'll say it is intentional. Basically, the damage dealt from the planets is treated as if you had dealt it to yourself. Since Firespitters have Fire and Earth after a certain level, they're ignoring their own Fire absorb.