If a hero completes an Encounter but does not claim it, can a later player claim it, and must it be completed again?

Question

Accepted Answer

A later player can claim it only once its requirements are met again. Encounters that build up over turns stay claimable, while ones that need the requirement in a single turn reset.

Harry Potter: Hogwarts Battle

If a hero completes an Encounter but does not claim it, can a later player claim it, and must it be completed again?