Ways to reverse dream mist

I know the user says that there is no way to reverse this transformation after using the dream mist oin a pokemon but theres a lot of lies in the world so is that actually true? To the devs; you came through before with tellingme another way o get a lucky egg dont fail me now

Supposedly, the Waking Guru in the Dream World changes your Pokemon’s HA to a primary ability, but it’s bugged, so right now there’s no way to reverse the transformation.