Ihave been on my new FS2 phone reader. I’m 96% on target 4%. High 0% low, with ave. Daily 7.5 Even on FS1 I never had even one low. Yesterday I had 4 Alarms, took a sugar pill. And now it doesn’t show up on my on target number. I’m using an older iPhone 7. is this a sensor issue or have I really started having low readings.