Describe the bug

When pasting text in the middle of a link, the link is split (pasted text is not part of the link).

This makes it impossible to quickly change the link text via copy/paste.

Steps to reproduce

1. Select some text and create a link.
2. Copy some small inline text.
3. Place cursor within the link and paste.

Expected behavior:

Pasted text becomes part of the link.

Actual behavior:

Pasted text is not part of the link, and the link is split in two pieces.

Screenshot:

Note:

This issue was found in Gutenberg (WordPress/gutenberg#11571) and already has a fix there: WordPress/gutenberg#14815 . It may be possible to port some / all of the code changes in this PR to packages/block-editor/src/components/rich-text/index.native.js to fix the same issue on mobile.