In the past couple of weeks, I have gotten numerous "vehicle connection errors" when try to preheat the car in my condo parking lot. So I am unable to start the HVAC, and in the current cold spell this means a very cold cabin and a cold battery when I go for my first trip of the day. Although I have had them occasionally before over the 3-1/2 years I have had the car, these errors were infrequent -- until these past couple weeks. I park in the same place, so I cannot easily see anything that would account for the increase in connection failures. In recent days I have been unable to start the heating on most attempts. It seems to work better elsewhere, though, so it might relate to something about my parking lot or the AT&T signal in this area. What is especially odd is that the car can apparently connect to the AT&T network to send notifications. E.g., an hour or so it sent me a notification that the battery charging was complete. But now i cannot start the heat. This makes no sense to me. At the risk of confusing sequence of actions with causes, i will note that it seems to have started, or gotten worse, since I got the latest update. I am on 2018.5.6. Anyone else with similar change in vehicle connection success rates?