Spool status is '-' for RFC user after label printing

Hello Experts,

I am facing a weird issue while printing TO label. There is a RFC which gets called from scanner application to create TO and print label. Scanner application uses a system user id to call the RFC.

When scanner application calls RFC, spool is generated for label but its status is '-' and due to which it is not getting print immediately. While for other user(dialog), spool's status is Completed and immediate printing is happening.

I checked in user profile of system user and Print Immediately is active for the user. Thanks for your help.