"z @ reba . tmp" Font Issue

[Rebekah301675338zqd]

How/why do I have a font (z @ reba . tmp) that is not showing in the document fonts list. It defaults everything to this and sometimes, when I save the documents, will override the entire document in this font and I cannot return it to another font at that point. 

[Karl Heinz Kremer]

Please see here for a similar problem: https://community.adobe.com/t5/acrobat-discussions/quot-z-r828-tmp-quot-font-instead-of-arial/td-p/9...