I have finished all the triumphs but one for Forerunner. The last one I need is to finish the encounter rotation. I have talked to multiple other players who want this seal but are blocked by the recurring Nokris Interference mission. This is very disappointing Bungie and I hope this is fixed.
It should rotate back maybe? But tbh it was one of three different encounters each week on a rotation of 3 weeks since the season started a long time ago. I hate to say it but you might have missed it