Have updated to version 3.0.3 and the extra text on the presentation page settings disappears after it has been set and changes saved. When I return to the Extra Text settings the text has gone.
Thanks for pointing this out.
There’s indeed an issue with the display of those extra text fields data in the settings, resulting in them being empty (although the data is still saved at this point). However, if the theme settings are saved while these fields appear empty, the data will be lost.