Store content as HTML and MIME : loose some text format

In a richtext field with option Store content as HTML and MIME activated, some text format are lost.For exemple the indentation (F8) or text align justify are lost.

If I write text and set an indentation, it appear well but when I save, close en reopen the doc the identation is lost.

When a richtext field without option Store… checked is displayed on the web the indentation is visible (and don’t disappear in the notes client).

Is it a but? How can I solve that?

Thanks in advance for your responses.

Isabelle R.