I've noticed some scenes on bucket that contain empty (no geometry) detector footprint masks. Examples: http://sentinel-s2-l1c.s3.amazonaws.com/tiles/11/S/MT/2016/8/17/0/qi/MSK_DETFOO_B03.gml http://sentinel-s2-l1c.s3.amazonaws.com/tiles/36/L/XR/2017/11/10/0/qi/MSK_DETFOO_B04.gml
I didn't find it mentioned in Sentinel 2 quality report. I'm sorry to bother, I know it's not the right place to report an issue. Where should I report issues related to Sentinel 2 on AWS?
UPDATE: I have checked the masks at Copernicus SciHub and they are empty as well. So I wrote to EO Support.