Can't undo first edit in editor based on `div` tag

[davidyuk]

If editor text prop contains empty string, and I want to type "Lorem" and then undo it by ctrl+z, first argument of onChange callback will be called with values:

"L"
"<p>L</p>"
"<p>Lo</p>"
"<p>Lor</p>"
"<p>Lore</p>"
"<p>Lorem</p>"
"<p>Lore</p>"
"<p>Lor</p>"
"<p>Lo</p>"
"<p>L</p>"
"L"
"<p>L</p>"
"L"
"<p>L</p>"
"L"
"<p>L</p>"
...

So, I can't undo typing of first letter "L".
Editor example with empty initial text value: https://davidyuk.github.io/react-medium-editor/

Also, if I use <p></p> as initial value, I can undo all, but content places before <p>:

"L<p></p>"
"Lo<p></p>"
"Lor<p></p>"
"Lore<p></p>"
"Lorem<p></p>"
"Lore<p></p>"
"Lor<p></p>"
"Lo<p></p>"
"L<p></p>"
"<p></p>"