Cannot find section break; searched with ^b but it is not getting highlighted

[Swarup]

I have a document with around 35 chapters. In between chapter 28 and 29, somehow the section break is happening between the first and second pages of chapter 29, rather than at the start of chapter 29. I have searched for the section break using ^b; for most of the chapters the section break is highlighted and easily visible as I do the search. But at the chapter 28-29 junction there is no section break visible; the ^b search function brings me to the first page of chapter 29 as though there is a section break there, which is expected as there is indeed a section break happening at the bottom of the page. But there is no section break highlighted, making it impossible for me to delete it and create a new section break in the proper place.