when using string-list-suffix attribute for service definition, invoke method (from associated event handler) will try to parse parameters from both request variable and rawParameterMap which was also built from request. So we end up with duplicates in resulting list.
This behaviour seems to be introduced with
OFBIZ-10848 XML import fails when xml data contains special symbols
- is caused by
OFBIZ-5048 Multi Part Input Parameters not Available in Groovy Event