Suddenly, the links started to work again on all tested iPhones. There was no iOS update involved. I'm really struggling to figure out what is going on so I can understand. Is there anyone who can explain this?

This problem seems to be duplicated and on one tread it's marked as solved, but it's not. So I add some more information here: I have the same issue. Strangely there is no sensible pattern when it works and when it doesn't work. Example: ourdomain.com/profile/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 <-- does not work ourdomain.com/profil/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 <-- works By just changing profile to profil the iPhone will scan the NFC properly. When there is profile in the url, iOS seems to think this involves an AppClip. It doesn't stop there. This is also strange: When I make a QR code from the link ourdomain.com/profile/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 this happens: Scan the QR code in the camera App -> it works!!! Scan the QR opened from the control center -> Same problem as with NFC!

I have the same issue, but we're only using https:// as a prefix so the suggested solution is not working. Strangely there is no sensible pattern when it works and when it doesn't work. Example: ourdomain.com/profile/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 <-- does not work ourdomain.com/profil/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 <-- works By just changing profile to profil the iPhone will scan the nfc properly. When there is profile in the url, iOS seems to think this involves an AppClip. It doesn't stop there. This is also strange: When I make a QR code from the link ourdomain.com/profile/n/6d18aadb-dfcc-47df-a9ac-d30b2cbad9c2 this happens: Scan the QR code in the camera App -> it works!!! Scan the QR opened from the control center -> Same problem as with NFC!

Same problem here

I'm experiencing the same issue. But these tags previously worked on iPhones.