Unfortunately it is still an issue.
It looks like they fixed it for those people who completed the 3 conquests BEFORE the patch.
Those of us who have Curses! as our last conquest(yesterday) are still seeing the same issue, All 3 Conquests are seen in Season Challenges as completed, but the Season Journey still is not checked.
I wonder if this will be a weekly "fix" where anyone who completed it in the week before will have it updated.