Right? Dude, please provide some additional context around your web browser stack because something you’re using is triggering their system. That or you’re click house neighbours are using your wifi.
I can see that might be it - because it means LinkedIn would be seeing you logging-in from different IP addresses in different geolocations every time (though Apple doesn't let you virtually change-country, I understand in the US it does make it look like you've moved-state).