Autocorrect, autopunctuation, and autocapitalization not working on iOS Safari

[josephdpurcell]

Issue Summary

The features of autocorrect, autopunctuation, and autocapitalization are not working on iOS.

I took a video recording of the behavior.

View recording

FullSizeRender.MOV

Steps to Reproduce

1. On an iOS device go to the demo https://bustle.github.io/mobiledoc-kit/demo/
2. In the editor input notice the first character is capitalized, but no other characters get capitalized
3. Notice that entering two spaces does not result in a period followed by a space
4. Notice that misspelled words do not result in a prompt for the correct spelling

Browser & OS version

iOS 15

Related issues

• Autocorrect, autopunctuation, and autocapitalization not working on iOS Safari TryGhost/Ghost#16049 - the original issue posted on Ghost
• Text suggestions and autocorrect don't work on iOS #761 - which talks about text suggestions and autocorrect but not autocapitalization or autopunctuation
• Spellcheck underlines flicker when typing #621 - an issue that might help clarify the underlying cause