Indesign is strictly forcing the rule that a footnote should start on the same page where its footnote reference is located. While this is usualy helpful, sometimes it creates problems like large white areas or even complete inability to layout the text.
See for example the images below. Image 1 shows how indesign can't put any text and leaves white pages - actually the layout stops here and no text is viewable on next pages.
Image 2 shows the reason: there are 2 footnote markers on the same row, both with long texts on the footnotes. so when the text of footnote 3 exceeds current page, ID has to put the rest of the row on this page, with the marker for footnote 4, but the content of footnote 4 has to appear on next page!
So my suggestion is to add a checkbox on the footnote options dialog box allowing footnotes not to START on the same page as their marker. (there is already a marker for "allow split footnotes". this is not enough to solve my problem)