If you take this device to Apple and can demonstrate the same as you do here, they will likely replace your device. Why waste your time here as there is little we can do. Something is wrong as my X is buttery smooth and faster than any iphone I have owned.
I did, that was from December. That was the replacement X they gave me after the first one had the same issues. I have since been on my third and nothing has been resolved yet. I have been notified Apple is "looking into it" but haven't heard anything about it yet. Not a huge deal the phone isn't a daily driver anymore just frustrating since I do have to use the phone still.