This article deals with keys that feel the same physically/mechanically but show irregularities regarding how they control sound.
If you feel that a key reacts differently to sideways bends than other keys, e.g. reaches the maximum bending interval too soon or not at all, or is inconsistent in its pressure/aftertouch travel, then you should try a manual calibration of the key.
Press the "m" button (mode button) to go to mode selection screen -> global settings ⚙️ -> 'calibration tab' and launch the 'key calibration assistant'
The procedure will be explained on-screen.