This happens quite often with clear glass over dark veneers. Not so much with light colors.... Well its happening , but you cant see it as well.....gordons glass does it too... sometimes you'll see tiny stress cracks as well as cloudy spots, or streaks. Its purely cosmetic, and nothing you can do about it...
I do not warranty clear glass "To be clear" . there is no control for it... Some come out good and never have an issue. others it takes a year or two to develop. and some come out of the form with streaks.... Nature of the beast.... Kirk