The iPhone is prone to another Unicode text bug, being dubbed the “black dot” bug. Outlined in a new video by EverythingApplePro (via 9to5Mac), the bug was first discovered on WhatsApp on Android, although it affects several other platforms as well, including the iOS Messages app. The bug was originally spread with the “black dot” emoji, but actually relies on the crafting of Unicode text strings that contain thousands of invisible…