Font Seravak looks different in PDF-file

[Elles]

I recently switched from Indesign to Publisher and now I'm having a problem with the font Seravak. According to the Font Manager the font is installed and the font looks fine while working in Publisher. But in the exported PDF-file the font looks completely different (bold and italic instead of light), see attached examples. 

Any suggestions? Thank you!

example_indesign.pdf example_publisher.pdf

[lacerto]

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[Elles]

@Lagarto   Your suggestions worked perfectly! Thanks for your help 👍🙏