Both of MY rear doors need to push/slam pretty hard to close. After some testing, it was obvious these doors are off-aligned. I can even feel a bit resistance when open the door. Front doors have no issue in comparison. Just had a service appointment with Tesla, and they worked on the mounting bolts and striker alignment. Now both doors close properly. I can visibly see better alignment of the rear doors to the body panel too. If other owners have the similar door issues, you should definitely have them to get it fixed.