Unexpected ResultSet Object exception thrown when calling stored procedure using prepared statement

I have a database connection that creates a stored procedure in the attached file. The stored procedure has one input parameter and several output parameters. It does multiple inserts into a table and then selects data from the table in this example.

In code, we take the database connection and create a prepared call, set the parameters, and then execute the statement.

When using the 2.7.11 JDBC driver, this works just fine without a problem, but when upgrading from 2.x to 3.x, we get a SQLException: "the given SQL statement produces an unxpected ResultSet object".

This exception is coming from the ServerPreparedStatement.executeLargeUpdate() method of the driver. After a bit of debugging I found that the results list that is populated after the execution has one or more Result objects, and then the last item in the list is the OkPacket. This method is expecting the OkPacket to be the first item in the list not the last causing this problem. If I fork the code and change the line from:
currResult = results.remove(0);
to:
currResult = results.remove(results.size() - 1);

The call to the stored procedure executes and returns successfully.

I am not sure if the results list always has the OkPacket as the last result in this list, so I am not sure if this change would work in all cases.