We have been testing the new #gradebook. We have noticed that if you are using a third party LTI system integration, the new late policy may not work. Apparently the 3rd party vendors do not always send over the time and date when the grades are syncing.
We also found that many 3rd party integrations have their own late policy on their side such as pearson lti. Instructors need to be careful when using both late policies not to double deduct points from the student.