Typography problem

I have one local font with OMGF (it is setup via customizer). It is EXO, that I use for paragraphs. For headings I use Tahoma, that I have not stored locally and I set it up only in the customizer as standard. It worked fine until now. When I wanted to create a new post today I found that I only get the right font for the paragraph-block-element (the font is EXO) but not for the headings (the font is TAHOMA). I really don't know what changed after the latest update of gp-theme, as all the older posts still show the right fonts, but I can't get or set "Tahoma" neither in the gp-block-heading-element, nor in the standard-wordpress-block-heading-element for my new post.