Expected

Newlines entered between headings are preserved when switching to HTML and back

Observed

Sometimes, switching gets some newlines (BRs) removed.

Reproduced

1. Enter 3 heading lines (h1, h3, h5)
2. Enter one newline between each heading and a trailing one
3. Switch back and forth between HTML mode
4. Observe a newline (randomly) get removed

Tested

Nexus 5X, Android v7.1.1