Concordance Search - No results proposed

Hi!

I'm experiencing a new problem using the Concordance Search, maybe this has to do with the last updating (it functioned before that):

I have no results when searching for a term in the source, while I perfectly know there are many occurrences in the TM.

I receive correct results in the "Translation results" and "Fragment Matches", but nothing in this Concordance search, neither using the F3 key nor pressing the button "Search source".

When I go to the "Translation Memories" tab and I launch the search, I receive the results I expect.

Has someone an idea?

Thank you!

Marina