XBOX Controller Stick Drifting

Hi, 

I have been playing Apex Legends a lot and when it became available for us to use advanced look controls I started to mess about with them, quite unsuccessfully at the start. Now after quite some time of tweaking them I believe I have what is the best controls settings for me. There is, however, a problem. The deadzone on my right analog stick leans slightly to the right, this means I cannot hit my outer threshold value when going to the right, but can easily on the left. I have switched back to in game settings and the threshold seems to work perfectly on both sides. Another friend who use his own ALC settings has noticed the same in his deadzone. My controller is also only a week old and is a v2 model. Can you explain why this is and how to fix it?

Thank you.