Owlet alarming low o2!!!!!

Guess • 🔹Married to my high school sweet heart🔹Mom of three amazing boys, Maverick born Jan 2017, Arius born Sept 2018, and Draxton born Aug 2021

So my son is 4 days old and tonight is the first night I have used the owlet monitor on him. It’s the exact same monitor I used on my 20 month old when he was little. My problem is it has red alarmed twice now low o2 levels when nursing (it alarms at under 80%)

I made my older son wear this alarm until he was like 9 montha old and it NEVER red alarmed like this..... what do I do???? Is it normal to drop o2 for a min while nursing???