TEXT IN BLOCKS DISAPPEARING WHEN SAVING AS PDF

The text in our blocks, we insert as a note on the drawings. If the drawing is saved as a pdf, the text disappears (see attached drawing). If the drawing is plotted as a pdf then the text in the block is fine. Anyone have a similar problem to this? the vault is set up to save the drawing as a solidworks file as well as a pdf. I don't believe you can change the pdf option from a save file task.

Thanks

Brad

SolidworksDrawings And Detailing