Hi,
I’ve seen this happen for weeks now. I will export a PDF of a board and some of the frames/pages in the resulting PDF will have parts missing - either an image or some text, or both. There’s no pattern whatsoever: sometimes the frame in question will only contain some text and that will be missing. Very infuriating. When I go back to the board, right-click the frame and choose ‘Copy as image’ and paste it somewhere, it works alright. However, the PDFs end up messed up.