Background script failing in target instance with empty output when accessing sys_user field

The same GlideRecord script executed in the target instance after deployment. The code grUser.getDisplayValue(‘sys_user’) is highlighted, but the output panel (highlighted in red) is empty – no error message, no data returned. The script fails silently because the sys_user field doesn’t exist in the dictionary. This contrasts with image 03 where the identical code worked perfectly in the source instance, proving the deployment broke the M2M functionality. The silent failure makes this bug particularly dangerous for production deployments.