Publishing HTML post while viewing Visual mode bug

[rezzap]

Expected

I would expect that if I write a post in HTML mode and then switch over to the VISUAL mode editor before pressing on publish would publish my post as seen.

Observed

If there is no unformatted text added to my post, the formatted text gets stripped.

If you add one line of unformatted text either in the Visual or the HTML editor, all content remains.

Reproduced

1. From an Android device create a new post.
2. Switch to HTML mode editor
3. Add formatted text in the content.
4. Switch back to Visual Editor.
5. Click to Publish
6. View the post and you'll notice the text is stripped, only the title displays. If no title is added, the post cannot be published.

Tested

Samsung Galaxy Tab A on Android 9 with 13.8 Did not replicate this is iOS app.

Reported in 2616622-zen