Describe the bug
Redo is lost after redoing a link on rich-text.

To Reproduce
Steps to reproduce the behavior:

1. Start an empty post.
2. Add a paragraph block and write something.
3. Add formats (Bold, Italic, etc...).
4. Add a link to one of the words checking Open in new tab option.
5. Add more changes (formats or new words).
6. Undo changes until the link is undone.
7. Try to Redo all the changes again.
8. 💥 The Redo history will be lost.

Expected behavior
Redo should work redoing all changes that were undone previously.

Video

https://cloudup.com/cOPGvdNJnli

Smartphone (please complete the following information):

• Device: iPhone XS
• OS: iOS only

Additional context
Add any other context about the problem here.