Apple appears to have fixed one of the more annoying day-to-day issues reported after the move to iOS 26.4 RC. According to AppleInsider, and echoed in IT Home’s coverage, the release candidate includes a keyboard-related fix aimed at improving typing accuracy on iPhone.
The problem had been especially noticeable for some iPhone 17 users. When typing quickly, certain letters would appear to register on screen but then fail to make it into the text field. That created a frustrating gap between what people thought they entered and what actually showed up in messages, notes, or search boxes.
This kind of issue goes beyond a simple missed tap. Reports say the bug could also confuse the phone’s correction engine because the system was not dealing with ordinary spelling mistakes. Instead, characters were being dropped altogether, which meant the software had less context to understand what the user was trying to write.
As a result, the keyboard bug could trigger a chain reaction: missing characters first, then increasingly unreliable autocorrect suggestions afterward. For people who type quickly on mobile, that combination can make the entire experience feel sloppy even when the touchscreen itself seems to be responding.
Apple has now acknowledged the issue in the official notes for the release candidate. The company says iOS 26.4 RC improves keyboard accuracy during rapid typing, which lines up directly with the complaints raised by affected users over the past several weeks.
The update does not look like a flashy feature addition, but it is exactly the kind of under-the-hood refinement that matters in real use. Text entry is one of the most basic things people do on a phone, so even a small reliability problem can feel much bigger than it sounds on paper.
If you experienced random dropped letters after upgrading, this release is worth installing once it is available for your device. For users who rely on fast message replies, email drafting, or note-taking throughout the day, the fix should make the keyboard feel more predictable and a lot less irritating.
