My son's iPhone does not show the right location in FindMy under People, but does under Devices

We have family sharing, and I'm the organizer.

My daughter's iPhone is set to be her location. She has sharing turned on everywhere in settings. She has an iPhone 11 and I have an iPhone 13. We're both on iOS 16.

Her location under *People* in my FindMy used to work fine for a very long time, but since about 2 weeks ago, it has just been showing her as being at school - always - regardless of where she is. Yet...

• my FindMy shows her iPhone *under Devices* in the correct location that her iPhone is at
• my iCloud.com's FindMy shows her iPhone as a Device (iCloud doesn't show "People") in correct location
• my MacBook's FindMy shows her iPhone under People and under Device in the correct location
• my wife's FindMy shows our daughter's iPhone under People and under Device in the correct location

So, just my iPhone shows my daughter under People at the wrong location - always at school. Under Devices, the iPhone is in the right location.

Additional info: Every time I check my daughter's location under People in FindMy... for half a second, when I check findmyphone on my iPhone… she/her iPhone shows as being where she actually is, then it quickly changes to show her being at school (which is wrong).

Any thoughts on how to fix this weird glitch?