This is a visual issue only, and is causing confusion amongst players.
It appears that no double fame is being awarded, but in fact, is still being correctly calculated & awarded to the player.
What's causing this?
The development team have been investigating the issue and have found that the double fame is in fact included in the calculations, and correctly being awarded, even though it doesn't explicitly state the amount is inclusive of this bonus.
What can be done?
Nothing needs to be done, it has been confirmed that double fame is in fact being awarded but is not clearly communicated. The development team has been advised to include the bonus icon again for future occurrences of the double fame promotion.