An issue with Apple's autocorrect feature emerged over the weekend after users began updating to iOS 11.1. First noted by Reddit user The Cravin
, typing the letter "i" can result in autocorrect replacing it with the uppercase letter "A" and a question mark symbol. The problem isn't universal, but is affecting enough users for Apple to publish a support document
that offers a workaround until it can be resolved in a future update.
The workaround involves setting up a Text Replacement for the letter "i". To do this, go to Settings -> General -> Keyboard -> Text Replacement, and tap the plus (+) button. In the Phrase field, type an uppercase "I", and in the Shortcut field, type a lowercase "i". This should fix the problem until Apple addresses it properly in the next iOS update, which shouldn't be far off.