Strikeout attribute not visible

1. offizieller Beitrag

    I cant find a way to get strikout text to appear in the WPRichText control. I can select and assign it as strikout, the button shows that it is on but it won't appear on the screen.
    Is this an issue with WP5.3 or is there something I need to do to get the strikout to appear visually?

    Ben
    Thomson Prometric