Usually at the end of a season we would be able to play all the grandmaster strikes over and over again but now in this season once you beat a grandmaster you can’t play it anymore unless you join someone else im curious to know why they changed this and if it would ever go back to how it used to be because it really sucks not being able to play them
They designed it to be a conqueror “title” catch up node. Meaning play the ones you need to get the title. People just farmed the easiest of the six or so ones they offered a season and Bungie caught wind. They changed it to make it unavailable after completions, making you play the ones you did not get done to get towards the title.