Fix is getting it swapped out. Mine started doing it when I went to .607. Rolled back to .320 and still had the problem. got it replaced and haven't had the problem since. Same story with my wifes s2.
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its software related. Dont do a torx screw fix for this! The discs sometimes crackles when you press. For now, all we can do is stop for a quick second and repress the same spot again. A battery pull fixes it but usually just a 2nd or 3rd reclick will correct the problem. Call it a device or OS flaw, but its nothing more than that