Ghost alerts

Ghost alert:  "unsafe site" "we recommend you do not use this site"

I keep getting this alert message popping up on my phone - sometimes 3 or 4 times in a row.  Often it happens when I'm not even using the phone - it's just laying on my desk.  The problem is, other than the Norton logo and the messages quoted above, there is nothing else on the alert (like "see details" for instance) - nothing I can click on that will take me to any more info.  If I open Norton 360 app, it's not showing any issues - everything is OK.  I've tried clearing iPhone storage for Safari, but the alert keeps coming back (although I'm not even sure it's a Safari problem).  My iPhone 14 iOS is up to date and I've restarted a couple of times.

It's becoming quite annoying.  How do I: a) figure out what's causing it and b) stop it?

Duplicate post answered here.    https://community.norton.com/en/forums/unsafe-site-alerts-wont-stop