Guys! iOS 9.3.1 is out! More here: https://infinitediaries.net/ios-9-3-1-is-out-it-fixes-the-safari-mail-messages-link-bug/

It's an OTA update or you can download the IPSW files from here: https://infinitediaries.net/ios-9-3-1-ipsw-direct-download-links/