I have two almost identical courses (although this issue may be more wide spread) and if I select the second course to revise (water) it presents me with questions from the first (current course).
I’ve tried refreshing (by pulling down) but not logging out.
It does eventually work, but just testing by swapping back had the same problem.
I’ve not noticed that before.
Do you need more information?
Perhaps wait to see if others experience it too.