- open the attached document. It contains a text form control with formatting
  ("Rich Text Control").
- set the cursor onto the word "document" in the surrounding text.
- click into the control to focus it
=> the "Text Box Formatting" toolbar appears
- click onto the "Superscript" (or "Subscript") icon in the toolbar
=> the super/subscript is applied to the word "document" outside the control,
   not to the control content

Expectation is that the two icons in the toolbar apply to the control content,
as all other icons therein do.