Undo: paragraphs not restored when undoing image+text deletion

[scofalik]

📝 Provide detailed reproduction steps (if any)

1. Set data where you have a paragraph with text, an image, and some other paragraphs with text.
2. Start removing data using backspace key from the end to the start.
3. Try undoing all deletions.

✔️ Expected result

Final content after undo is as it was at the beginning.

❌ Actual result

All but one paragraph after an image are missing.

📃 Other details

Jan-20-2021.10-45-25.mp4