To be honest its well documented in the forums that almost all 2015 Chryslers on all models experience a soft shift to a hard shift from 4th to 5th gear and also from 2nd to 3rd gear. It is normal and I'm sorry to say but you'll have to maybe live with it. My 200c does the exact same thing. Granted its a soft to mild shift nothing hard but I always know when its on 3rd or 5th gear.
I have a 2015 200S 2.4. Since I purchased the vehicle with 18,000 miles, it's had a really hard shift from 4th to 5th gear. This generally only happens when the trans temp is at 165. It took several trips to the dealership for them to recognize there was a problem, which they finally did. So far they've flashed, re-flashed, replaced the valvebody, and ultimately the transmission with a rebuilt one. Now - they're once again, denying my concerns. I've reached out to Chrysler and they can't help unless there is a "diagnosis." Vehicle is at 42,000 miles now - about 10,000 on the current transmission. Has anyone else had the same problem and have any idea what might be going on here? Tips on getting the dealership to help?