Inconsistent Results With Stored Procedure

Has anyone encountered any issues with running stored procedures on MariaDB and Laravel? I get two different result sets when calling the exact same stored procedure with the exact same parameters through Lumen (via DB::select) and MySQL Workbench (calling the stored procedure directly)! These are wildly different results, not close enough results.

My stack is as follows: Lumen 5.5 PHP 7.1 Nginx 1.10.3 Ubuntu 16.04 MariaDB 10.1 (Amazon RDS) Application server running on Amazon Lightsail

Thanks in advance!