Phone ringing with no call

I am logged into my Zoom account on my phone. I have notifications turned on and my phone volume was turned on. My zoom sound started going off as if a call was coming in but there was no call coming in on the app, the phone, or anything like that. I've checked on my computer and there was no missed calls either. I even checked my activity log and there was nothing there. What is going on - why is my Zoom haunted?!