Text unexpectedly converted to headings if the very first line in the post is a heading and you edit text below it

[designsimply]

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Steps to reproduce:

1. Type some H3 text as the very first line in the post.
2. Type some normal paragraph text.
3. Edit any paragraph below the heading by adding text anywhere in the line then pressing the space bar.

Result: all of the text on the current line and everything between becomes part of the heading. Note: this only happens if the heading is the very first line in the post and the conversion happens after you type something into a subsequent paragraph then add a space. (3m42s)

^{Tested with WPAndroid alpha-190 (13.3 alpha) on Pixel 3 Android 9.}

_{/hat tip @thehenrybyrd for the report (internal reference: p4a5px-2rO-p2)}

[designsimply]

If you throw in an image some time before step three, then the heading text ends up overlapping the image. I believe this is the same bug but with an image thrown in. 🙂 (1m52s)