Sobi, have you found out what the problem was yet? I'd be interested in knowing.
If you haven't, here are a couple of things to check:
1. Have you, by any chance, placed the text inside an anchored frame in the table cell? This will cause the effect you describe, because frames cannot break. You would even get this effect if you had drawn a text frame in the table cell and then put text in it.
2. You say the frames on the two pages are connected, but do they have Autoconnect on? To check, select the base text frame on the page. Get Properties on it (the easiest way is from the mouse context menu) and make sure there's a checkmark in the Autoconnect box. If by any chance there's not, you'll probably want to correct it on the master page, not just the body page.
HTH
-Rhea