A few weeks ago I noticed a crack on my rear hatch glass. It started at the very bottom and started traveling up to about 8" and then went towards the driver's side about 8". I contacted Tesla and they had me run a ball point pen along the crack and said that if it sticks then it shows a point of impact. No sticking and nothing visual showed a point of impact. My appointment was today and after several hours it seems that the issue is being escalated because the Tesla Engineers are saying while there is no point of impact this wouldn't normally be under warranty because I have tinted the rear window. I had the work performed at a reputable shop and had suntech ceramic installed. I've had many many cars tinted over the years and have never had anything like this happen. To Tesla's credit, I have a loaner until they have more information and the SC is going to bat for me and escalating the issue. Anybody else have a similar situation or can offer advice?