I would start by examining the keep settings on the last paragraph and the ones that follow. If you are comfortable sharing the file, I'm happy to take a quick look. You can put it on dropbox and message me the link by clicking my avatar above this reply and then clicking message. You don't need to include the images.
Is the text frame created on the document page? Or was it brought in as an element from the parent page?
You may also want to go to your Type menu and select the Show Hidden Characters menu command, just to be sure that there's not some kind of funky non-printing element like a page break or forced line break messing with your text thread.