PDF fonts revert to default

My pdf is a restaurant menu. I want all yellow heading font to look like the “Scrumptious Sides” one. As you can see, the other two yellow ones above, “Succulent Sandwiches” and “Savory Soups” have reverted to a default font. On the pdf itself, the fonts are correct. They only revert once I upload them to WordPress then use the plugin. Any advice? Thanks!

http://www.apfoodtruck.com/menu/ demonstrates the issue.

I just noticed that this is only a problem on the newest Internet Explorer. Ideas? Thanks.

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