Icons not displayed because of incorrect style class saved in Widget-Additional Settings

In FontAwesomeIconWidget in the "Additional Font Awesome Settings" the style select options are a list of 3 letter abbreviations (fas, far ...) but on save they are prefixed with "fa-" resulting in values like "fa-fas" so on next edit the value for style is not recognized.
In the formatted "fa-fas" is used as a class for the icon but no such css exists in fontawesome 6.4.2 library (required from composer.libraries.json)