The release of Qobrix v34.8.2 introduces an improvement to the Basic Search in modules with Related fields used for listing.
Basic Search Improvement
In this version we have removed the Related field type from the allowed column types used for the Basic Search. This should fix the confusing expansion of the search criteria in Basic Search on the modules that use Related fields in the default System Search. As a side effect, this change also makes Basic Search significantly faster for such modules.