Hi Marco,
That item does not seem to be returned to any specific search phrase, even it’s full title, in which case it should be the first results. I am guessing, that it is either not indexed or excluded in some way.
Can you please check:
– If the correct custom post types are selected under the index table, as well as the search instance options panel
– If there are any exclusions (category, tag, user, date etc..) – the item might be excluded via these
– If anything is changed, then don’t forget to re-index
If this does not work, then can you please add temporary back-end access? I would like to check the overall plugin configuration. Thank you!