Another Unicode text bug has been discovered in iOS, which will repeatedly crash Apple’s Messages app by overloading its memory.
The “black dot” message contains an emoji like ⚫, although it’s not actually the emoji which causes the message to crash the app. The bug affects iOS 11.3 and the current iOS 11.4 beta seeds. A similar message recently did the rounds on Android. As of yet, Apple has yet to release a fix.