Air Purifier outlet Grill --Dust Buildup

My air purifier has been getting a lot of dust buildup on the outlet grilles . We run this unit 24/7 in our bedroom and we still see significant amounts of dust in the room as well. The filter has been changed and checked but is obviously not sealing properly. Is there known issues with replacement filters not sealing properly? I really didn’t notice this issue until after replacing the original filter. The images are after 10days of cleaning the grates. I have two other filters (BlueAir) in the house that run constantly and have never had this issues. Dust Buildup on the inlet grates but never on the outlet.