Before the day of ceremony, they will search GCMS once again, and if there is any adverse information, they postspone your ceremony, and need more time to process. So you only wait until that is resolved.
Don’t worry. My spouse‘s app was updated after 3 months althought they received it. once it is updated, that mean you will updated LPP soon, and take oath.
Because people think like that, so some people after completing all on tracker, take a long time to get an ceremony invitation, In fact their applicaion is still not DM on the system yet. Maybe I'm wrong, but I saw a few.