I had just manually resolved a Resolve Attack event, but it is not disappearing from the Actions menu.

Yesterday, I also completed an event in which Solmar the Shackler visited my stronghold. After I completed the event and the NPC left, the event still didn't disappear from the Actions menu. Eventually, the event "expired" and the system said the NPC left (but he already left right after I completed the event).

Edited July 18Jul 18 by IanTheWizard

After quitting and restarting the game, the Resolve Attack event disappeared from the Actions menu.