I just did another astral alignment run. Sometime at the end the bottom line pop up said I had completed another seasonal triumph. I didn’t bother reading more. When I went to claim it, it said “unclaimed challenges” und seasonal challenges in the quest tab menu. If I open the seasonal challenges menu though, there is no challenge for me to claim. I assume I unlocked something for a week to come. Now it shimmers constantly trying to make me claim it, even though it’s impossible. It’s rather annoying currently. I’m not sure whether it’s a known issue or not.