Hello, I took delivery of my 90D at the end of May. Among other issues, one of the left front proximity sensor is very finicky. It sets off when the vehicle is stopped and at low speed although there is no object there (interestingly, it would become unreliable in warmer condition only). Most of the time it is a nuisance, but it also makes autopilot useless in a stop and go traffic on the freeway (where I use the feature most). Service center performed a firmware update which did not solve the problem. Since I do not relish giving up the car again, I did what any other non-engineer/ignorant person would think to do and placed a piece of electrical tape on top of the sensor. And this solved the sensor issue!! I have tested it for about it week. It has not set off falsely even in the heatwave that we currently have in southern California and it seems to function normally otherwise. So my question is, has anybody else dealt with this issue, how was it resolved and does having a piece of electrical tape over the sensor cause any safety concern (my wife is still not convinced of this fix)? I have already informed the service center and they have not reached me back on this yet. Thanks in advance.