On 2013-12-06 H. van der Meer wrote:
Some further experimentation: interchanging two chapters makes the problem go away.
It is reproducible, because putting the chapters back als brings the problem back. Even stranger, sitting at chapter 5 it kills the interaction for chapter 6 and 8, leaving the interactivity for the intervening and later chapters intact.
Addition of content to the start of chapter 5 helped for chapter 6 but not for chapter 8, which seems strange. Addition of content to the end of chapter 5 also helped for chapter 6
Addition of content to the start of chapter 7 did help to solve for chapter 8.
So I fear it has in some way to do with the moment the output routine is called in relation to the reference processing in \startchapter[title=,reference=].
This topic was discussed few weeks ago without clear conclusion: http://www.ntg.nl/pipermail/ntg-context/2013/075988.html In my case most of cases were resolved when I changed \placebookmarks[chapter, section] just to \placebookmarks[chapter] Although few cases still remain, it is much better now. When the particular item doesn't react via bookmark, it doesn't react also via ToC. I plan to prepare an example for this, but for me it is not so urgent issue. Jan