delete atomic by backspace will get 'a'

[clydee-geng]

The output html string simply removes the 'figure' and not the atomic whole

This is the html string entered

<p><figure><img src="https://s2.ax1x.com/2020/02/29/3yhm8S.jpg" style="width:166px;height:237px;" /></figure><figure><img src="https://s2.ax1x.com/2020/02/29/3yhm8S.jpg" style="width:166px;height:237px;" /></figure></p>