iOS 9.3.1 is out and it fixed the link issue!
I can happily announce that finally, Apple provided a fix for the link issue that appeared after iOS 9.3 was released, or actually after the latest booking.com update was released just before the release of iOS 9.3. Apparently, the bug had nothing to do with the release of iOS 9.3 (that’s why it also couldn’t be found during the long beta phase) but with the booking.com app and its affiliated apps as they registered too many universal links with Apple. Anyway, iOS 9.3.1 fixes the issue that we couldn’t click on links in apps like Mail, Safari etc. anymore. I installed it (only 27.5 MB in size) and all links were clickable like a charm! This is great! I can finally use my phone again and I hope you will too!
Have a great April 1st and let’s hope there’s no other bad (bug) joke coming along!