Can you share the document?
Um, yeah. We're going to have to see this one.
If you can't share it for any reason, turn on all hidden characters and post another image of the complete page.
I'm unable to share the file but here it is with the hidden characters.
Look into the following settings of your Paragraph Styles:
Firstable, you should remove all these useless paragraph returns and use the space after or space below feature to get space between paragraphs.
Does it erase the text, or does it back-flow to a previous page?
If you can share the file, any of us can get to the bottom of it very quickly. You can put it on dropbox and post a link to it here (public) or message it privately.
This file was put together with a lot of overrides, and styles based on styles that don't make a lot of sense (to me, anyway). I can't pinpoint the specific issue, but when it looks like the text has disappeared, it is still there, it is just transparent (even though the color is set to black).
When I clear the overrides, the issue is removed, but so is a bunch of the formatting. If this was my file, I would go ahead remove the overrides from this page, and create styles for the unique looks needed for the first two paragraphs at the top of the page.
(Note: when the text is copied to a brand new file, overrides intact, this doesn't happen.)