There is another post here stating a German article saying 'false highs' which is a whole lot more dangerous than false lows. This can cause people to overcorre

There is another post here stating a German article saying 'false highs' which is a whole lot more dangerous than false lows. This can cause people to overcorrect and go low. This said, the same CGM should have warned about the low. As always if your expected blood sugar isn't matching up with measured sugar levels do a finger stick as recommended by the manufacturer. There are a lot of potential device to human interface issues that can happen.