my new lexus ls 430 2001

just bought my first ls 430 , for just over £3500.oo she is fine except for 3 side windows delaminating so i have 3 half moon shapes in white all in the same place on each window , i did not spot these at first as the prev owner its only had 2 , had put please dont slam the door labels over the white half moon milky white marks , IS THIS A KNOWN FAULT ?car going into lexus tuesday 3rd jan so we will see i am very upset re this fault ,