Install iOS 11.4.1 to Fix These Issues
Apple lists bug fixes in the official iOS 11.4.1 change log, but the iOS 11.4.1 update comes with three known bug fixes.
They include a fix for an issue that prevented some users from viewing their last known location of their AirPods in Find my iPhone, improved reliability of syncing mail, contacts, and notes with Exchange accounts, and an unlisted fix.
The unlisted fix is for a bug that caused some devices to crash when the the Taiwan emoji was used or when the word "Taiwan" was entered into a text field in apps like Messages, WhatsApp, and Facebook.
If that bug fix was impacting your day-to-day use, you should think about installing the iOS 11.4.1 update immediately.
If you skipped iOS 11.4, your iOS 11.4.1 update will be loaded up with additional bug fixes including:
iOS 11.4 included a fix for the well-publicized "Black Dot of Death" iMessage bug that crashes Apple's Messages app with a specific string of characters.
iOS 11.4 also fixed a 3D Touch issue affecting devices running iOS 11.3 and iOS 11.3.1 where the feature wouldn't work without waiting a few seconds, or longer, immediately after unlocking an iPhone and a fix for an issue where app icons would start hovering out of place.
If you skipped iOS 11.3.1, you'll get an additional set of fixes with iOS 11.4.1.
Apple's iOS 11.3.1 update addressed an issue where touch input was unresponsive on some iPhone 8 and iPhone 8 Plus models because they were repaired using "non-genuine" replacement displays.
You'll also get the following fixes from iOS 11.3.1:
If you skipped earlier versions of iOS 11, your iOS 11.4.1 update will come with a variety of other bug fixes thanks to the versions you skipped.