Arch Linux / Appimage / 0.31.0

To test the app out i wrote up a keyboard shortcut reference document. It's just some tables, nothing crazy. I exported a pdf and when i opened it in firefox, page one of the pdf has a watermark in the center. It says Your Preview Will Appear Here (but in regular sentence case). It's sans serif, probably the regular weight. The font is differs from the font of the pdf's content. I can even select the watermark.

edit: i think i know where the watermark is coming from. i noticed while clicking on the preview that the phrase Your Preview Will Appear Here quickly flashes on screen as the document loads. i think that notification or popup is somehow making it onto the export itself.