Would you also be able to attach the PNG that you had exported directly from the RP file? It looks like the file and exported PNG still work correctly on our Windows machines with default system settings. Seeing your PNG file with the missing paragraphs may provide some more helpful information.
Also, did you ever set or modify your system display settings to something customized? On your computer, are you working at 100% DPI or at a different scaling factor?
In Axure RP, are you generally working at 100% magnification, or something different?
If restoring display settings to default doesn’t help, I’d be curious to see a video recording as you reproduce this issue. We often recommend using a free tool like Jing to record a session (https://www.techsmith.com/download/jing/). And I’ll be happy to check for anything peculiar in the video.