Humans come in many different sizes and we placed the rear window switch in a location to try to balance reach of both the window switch and door handle.
A review of fleet data showed unintended window opening (brief open/close) typically due to someone leaning forward, elbow hitting the switch.
Realizing we didn't get it perfect the first time, the team improved this by moving the window switch forward by about 50mm and that seems to have done the trick