From my testing: editing location info doesn't always update the "last updated" date (for example, adding a new phone number doesn't cause the date to update). BUT ONLY IN THE APP. If you make this edit on the app, the website will correctly display a new "last updated" date. You'll also see the correct date if you restart the app.
So the issue seems to be that the date display isn't refreshing on the app.
From my testing: editing location info doesn't always update the "last updated" date (for example, adding a new phone number doesn't cause the date to update). BUT ONLY IN THE APP. If you make this edit on the app, the website will correctly display a new "last updated" date. You'll also see the correct date if you restart the app.
So the issue seems to be that the date display isn't refreshing on the app.