Contingent Workers not displayed in Duplicate Check

Summary

Wen trying to duplicate check from External Candidate to Contingent Worker Applying as External we are not able to search for the candidate record.

Content

Our duplicate check was working correctly but suddenly stop working and we are unable to find Contingent Worker records so when trying to execute duplicate check for a External Candidate and try it to merge with a contingent worker the records are not being displayed, if we search for the contingent worker as a candidate the record appear correctly and we can do the merge in the opposite way without issue.

Have someone experience the same issue?