The indexes and Table of Content are not automatically updated. One needs to right-click the index or table and choose "Update Index or Table". This is error prone, since one may forget to update before, e.g., exporting to pdf. I propose as an enhancement to automatically update the index or table, at least optionally.
Hi Frederic, Thanks for posting this. The wish already is noted: bug 44448 Cheers - Cor *** This bug has been marked as a duplicate of bug 44448 ***