I am getting this warning but only when I am in my car and using Apple Maps via CarPlay to navigate somewhere. I do have a metal watch band but there shouldn’t be anything magnetic in it.

You’re in the car. It probably displays when magnitude of magnetic field vector changes (such as when near steel objects)

I also had that message entirely randomly the other day on My AW Ultra. Mine is paired with a 15 Pro Max

Got the same thing while driving for the first time ever the other day and I’m wearing an Ocean Band so not much metal on it. Guessing it’s a bug in the latest OS.

I got that for the first time ever two days ago.

The lugs on your band may be magnetic

Got the same warning while driving and using maps yesterday.

I got it today wearing the sport loop, so it’s just random I think.

I’ve heard some have higher magnetism in themselves or something like that. I just remember I had teach who said her wrist watch got messed up like that.

I got the same message every time I start driving. I was wearing AW Ultra 2 with band I randomly picked from my band storage every day.

You opened the compass app. Simple as that.

I opened the app and got the message. Then killed the app, reopened it and didn’t. Both times with a very magnetic Milanese loop. The compass tends to point north towards the top of the watch on account of the band.

I get it too. Just a standard warning and don’t think anything you did/use triggered it.

Your magnetic personality?

It’s just a reminder in case you wear something like the Milanese

Long shot question - but have you had any medical imaging with contrast lately? Like a CaT scan or other nuclear imaging? Maybe a long exposure chest/lung xray?