WORKAROUND
It is possible to customize the subject on the default template and correct it to:
ATTESTATION APPROVAL - Policy: '$FK(UID_AttestationCase).UID_AttestationPolicy[D]$ / Case: '$FK(UID_AttestationCase).DisplayName$' / Created: $FK(UID_AttestationCase).FK(UID_AttestationRun).PolicyProcessed:Date$ / Decision: $PC(DISPLAYDECISION)$
STATUS
Defect number VPR28251 has been submitted to R&D for review.