I don't know what a solution to this problem is but when I first got my S3 back in August it did that for about a month then just stopped and I never saw it again. In March I had a warranty exchange because my screen went black and the new one started doing it, too. Again, it did it for about a month, then it just stopped. have you recently replaced it or done a factory reset? Just an idea. Sorry I couldn't be of more help for a direct solution.
AT&T Samsung Galaxy S3 i747
Current Rom: Stock 4.4.2
AT&T Samsung Galaxy S2 i777
Current ROM: ShoStock3 Jelly Bean by Shoman94
AT&T Samsung Galaxy S i897
Current ROM: Stock GB (given to my Dad)
Barnes and Noble Nook HD+ (Stock; all of my flashing is done on my phones.)