3d touch popping noise?
I was using my phone before I went to bed last night. It was quiet in the room and I was 3d touching constantly in the app store to preview the apps. Then I noticed every 10-20 3d touches I kept hearing some sort of 'popping' noise. So I went to instagram and started 3d touching to preview images as well but it did not make any popping noise. Same with google image previews, it didn't pop. Then I went into the 3d touch setting (where you adjust the 3d touch sensitivity) and clicked on the test image and it popped every so often again.
Has anyone noticed this as well? To me it seems like it only does it in certain apps. Maybe its software related?
EDIT: took a video of it. You can hear it at 0:09, 0:17 and multiple times at 0:20
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