In Masks of Nyarlathotep, does "advance the active Mystery" affect only the current Adventure card?

Question

Accepted Answer

Yes for advancing: the current Adventure is treated as the active Mystery. For "solve the active Mystery" the rulebook does not say the same, and players disagree about it.

Eldritch Horror

In Masks of Nyarlathotep, does "advance the active Mystery" affect only the current Adventure card?