Fonts created on master slides not sticking

Hi - I created a set of master slides using variations of the font:  Franklin Gothic.

When I insert the masters into the presentation, the headline font is fine but the body copy font keeps reverting to Arial.  I have carefully checked all body fonts in the master and none of them are Arial. 

I also created a font set with the desired fonts, but still having trouble. 

Can you help? Using Storyline 2.  thanks

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