Circumstances/what happened: I was attempting to win the game via the 'Royal Ascent' quest, but I made an error* before accepting the quest and accidentally ruined my relationship to the point that I became hostile with the Empire faction; the quest then disappeared. I then built my relationship with the Empire back up to 100.
Expected: to be re-offered the Royal Ascent quest once I had become friendly with the Empire again. However, I haven't been re-offered the quest and I just noticed that the quest is marked as 'complete' on my quests panel. Sure this can't be correct?
Steps to repeat: I have not tried this, but maybe lowering your relationship with the empire to hostile and then raising it again to neutral/ally?
Save: https://drive.google.com/open?id=1Ra7kOtJ-tzFFxmghpy-EHlZX0MNu8x4b
*It's probably not relevant, but to ruin my relationship with the Empire I accidentally kidnapped a downed member of an Empire janissary squad after I had called the squad in to help me destroy an enemy base. He was downed, and I left the map with him, thinking that I was doing him a favour and could heal him back at my base, but it counted as a capture and the Empire was not pleased.
The quest should reappear after 30 days, so it's working as intended. The "quest completed" message should be adjusted though, thanks!