Find and merge duplicate contact doesn't work any more

Hi,

The function "find and merge duplicate contacts" has worked for me (last check in june) but now it has a strange behavior.

Some of the rules clearly doesn't show any results - and that is normal.

But other rules, who should show a result (that I know) only display the header of the result: "contact1, contact2 duplicate, treshold" but the rows are missing. (see attach)

I do not understand what is wrong here.

Kind regards,

Konrad Maquestieau