I notice it right away. Set the volume to mute and unlock the tablet. Do it in a quiet room or with it up to your ear. Anything that would normally play sound when it is muted is when it crackles for me.
Same problem here with 2 devices so far. Am thinking of trying a 3rd.....
Anyone able to fix the problem?
I notice that the speakers stop their noise making when I plug in head phones.