2020 Mitsubishi Outlander

After reversing out of say the drive way or parking spot there is a thump noise after putting the car into drive and proceeding to go. I have taken it to the dealer and they state multiple people are experiencing the same thing and that they have been in contact with Mitsubishi about it and they say it is normal. I have never had this happen in any vehicle I have ever owned before and for it to be told to me that multiple people are experiencing this is not very satisfactory. And should be something they look into. Another issue I recently brought to the dealers service department is the ac has a foul odor after the change of the filters. And that it smells like stagnant water or mildew and again I was told the same thing that it is common. Why would I want to ever purchase another Mitsubishi if they are saying all this is common among their brand. Seems to me the unit collecting the fluid that then gets drained from the unit when sitting still is just collecting and going stagnant and causing the smell. I have a warranty on the vehicle however everything is a normal thing people have going on with their vehicle. Seems they don't want to put in the work until say the warranty is expired. A warranty they offer along with the extended warranty to cover bumper to bumper items I purchased. Ac problem is what it is it's not a safety concern but the thump in the tire after reversing seems like it should be a recall of something to do with the suspension and I don't think it has been investigated as it should. Who is to say I'm on the interstate driving and get in an accident that not only effects myself but others.