Created attachment 177059 [details]
Screenshot

Please can you add a sample file for testing?

Created attachment 177169 [details]
File with corrupted index entries

I have done some experimenting with the faulty entries and have found the “problem”, if not the cause.
Incorrect index entries always have the form: {XE "entry:"}. If I remove the :, the index is displayed with page number; if I add an “:“ (without quotation marks) to a previously correct entry, the index is displayed without page number. What I do not know is how my document became corrupted! Because the problem concerns ALL marked indexed entries (many hundred), the “corruption” was some automated process; I may have been caused by merging Word documents.

With further investigation, the problem was caused by corrupted index entries in the original Word document.

(In reply to arudd from comment #5)
> With further investigation, the problem was caused by corrupted index
> entries in the original Word document.

Ok, sounds like this can be closed.