Scores from DeltaMath assignments were, but are no longer, syncing to Canvas. Example: DeltaMath has 100% for a student assignment, but Canvas has 50%, even though the DeltaMath assignment has a late date allowing 100% of the score to be achieved with late submissions.
Perhaps the Canvas assignment, being set due on a specific date, with no date "Until" entered broke the syncing??? Perhaps Canvas stopped accepting the late submissions from DeltaMath (DM was syncing every 15 mins). But I went and changed the due date on Canvas to later this week and it's still not syncing.