Thanks for this Amlan.
Looks like instead of using BAPI I can use the FM FKK_DISPUTE_CREATE which in turn does the database commit and all expected behaviour.
However, while replicating a case from FICA to CRM, I had to set up ALE distribution model with object BUS2022002 (Dipsute Case - FICA). The method "create" in the object calls the BPAI so, instead of that object I will not be able to sent the case to CRM.
Regards
Bodhisattwa