3 ‘Black Dot’ Text Bomb
Fixes for so-called “text bombs” have long been a staple of Apple updates, and iOS 11.4 is no different. The software update fixes the “Black Dot” Unicode bug (which, notably, also affected the Android operating system). Like many other text bombs, the Black Dot bug was a string of Unicode characters that could not be rendered properly.
As such, the Black Dot bug would cause apps like Messages to continually crash. But, depending on where the Unicode strings are displayed, text bombs like Black Dot can even cause systemwide issues. Thankfully, you no longer have to worry about this particular bug moving forward in iOS.