2452760 - FMCABP: unexpected result in Duplicate Check / no similiarities found

The transaction FMCABP does not find all expected Duplicates.
-> "Image/data in this KBA are from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

Contract Accounts Receivable and Payable, especially industry-specific component "Public Sector".

General: DFK_NORM_BP, PSCD, FMCABP, FP-GPART, FMCABP1, TFK_RULES, V_TFK_RULES, FPNORMBP, BUT0BK
EN: Duplicate check, Duplicity Check, Duplicite Check, typo, Replacement Rules, similarities, identities
DE: Dubletten, Dublettensuche, Dublettenprüfung, Dublette wird nicht gefunden, Rechtschreibfehler, Duplikatsprüfung, Ähnlichkeit , KBA , IS-PS-CA , Public Sector Contract Accounting , FI-CAX , Non-industry specific contract accounts receivable, payable , XX-PROJ-FI-CA , obsolete: Please use Component FI-CA instead , IS-PS-CA-MD , Master Data , FI-CA , Contract Accounts Receivable and Payable , How To