This post hasn't been updated in a while, but I'm having what appears to me the same issue. My passenger side rear door all of a sudden wouldn't open last weekend. I started walking away from the car, annoyed that my seven year old was taking so long to get out, but finally went back to discover him in tears because he couldn't get out. The door came loose from the latch and the window came down, but it wouldn't budge more than an inch - totally stuck. It felt like I could forcefully pry it open, but not without damaging something. I immediately made an service appointment. In the week wait up to the appointment, the door decided to open by itself on the freeway twice. Only the same inch before getting stuck, but I still got the warning chimes and had to pull off to force it back shut. My car is in service now, and they wanted $750 to make the repairs, as my 2018 Model 3 is no lounger under warranty. I complained and they admitted that it's becoming a frequent issue, but the manager said there was nothing they can do. After further inspection, they said they need to order the part and it will now only be $550, but I'll have to make another appointment. I consider this a manufacturing defect, and what ought to be a safety recall issue. I want to find out if there are more of us out there having these issues.