If you busted your butt getting the triumphs done then why did you not have the crystal encounter done when it was available multiple times over the last few months?
Hey there! If the Nokris mission happens again next week, you should assume it will stay like that for the remainder of the season. Also, there were opportunities to complete any remaining encounters you had due to the extension of the season. Unfortunately, nothing can be done at this point if next week is the Nokris mission.