Not confirmed [Indev 0.55.1] Earthquake hits flying types

[Falkner]

Description mentions as such.

Encountered while battling in Kolben Tower:
Metagross: Earthquake hits skarmory.
Snorlax: Earthquake hits Skarmory
Snorlax: Earthquake does not hit M-Pidgeot

Seems to only affect skarmory.

 

[The Omega Gengar]

Are you sure you didn't use Roost the turn before?