Thought it could be useful to post an experience here. I'm a rare user of summon; tried it for the first time in a while, and found that it wouldn't work - the app informed me that there was an error reading camera data and that it was disconnecting from the car. This happened repeatedly. I brought it in to the SC and they found that a plug to the rear camera was barely connected. They seated it, and it tested fine. As an aside - the rear camera never failed to work on the MCU screen during this time. Cheers.