ado.addnew/ODBC: Error with Decimal datatype

I am still testing the ODBC Driver for an application migration.

When trying to add a record with integer and char datatypes, ADO performs without an error. When I add a DECIMAL datatype, ODBC raises an error:

Valuation and B 2124-1e4c ENTER SQLGetDiagRecW
SQLSMALLINT 3 <SQL_HANDLE_STMT>
SQLHANDLE 0x00932AB0
SQLSMALLINT 1
SQLWCHAR * 0x0018D590
SQLINTEGER * 0x0018D188
SQLWCHAR * 0x0018D190
SQLSMALLINT 512
SQLSMALLINT * 0x0018D184

Valuation and B 2124-1e4c EXIT SQLGetDiagRecW with return code 0 (SQL_SUCCESS)
SQLSMALLINT 3 <SQL_HANDLE_STMT>
SQLHANDLE 0x00932AB0
SQLSMALLINT 1
SQLWCHAR * 0x0018D590 [ 5] "22002"
SQLINTEGER * 0x0018D188 (0)
SQLWCHAR * 0x0018D190 [ 71] "[ma-2.0.15][10.2.7-MariaDB]Indicator variable required but not supplied"
SQLSMALLINT 512
SQLSMALLINT * 0x0018D184 (71)

Seems to me the same as the previous .addnew error.

I will attach the ODBC Tracefile of my test.