Looks to be a mixture of both. For me, setting to 10% and saved into a new profile is not remembered next time the game is booted.
There’s something else though. If you have an xb1 pad, set left stick x axis to 100% deadzone, load up the a320 and notice that when you move the left stick left and right, the Airbus side stick moves fully in one direction but not at all the opposite. That doesn’t seem right - if I set 100% deadzone, the sensitivity graph suggests we should not see inputs registered along that axis which makes sense.