I am wondering if someone can provide insight into this. It’s a strange thing I noticed on the back glass of my 2021 model Y. I live in Seattle and do not get too much sun. Over the weekend it was very sunny and when the sun hit the back glass at a specific angle, I noticed someone had handwritten something on my glass. See photos. I went to clean both inside and out but the marks never disappeared. I even used rubbing alcohol thinking someone had used some type of marker. The writing can only be seen from inside the vehicle when the light hits it right. At other times it cannot be seen. From the outside it looks normal. After trying to clean it without success , it occurred to me that this writing is inside between the two glass panels. Has anyone seen this before? This is not a joke. It’s an enigma.