A process running in a terminal daemon will not be found in a new terminal using the job

I run a program in a terminal background. A new terminal was opened later because of the need for work. In the new terminal, I want to see the running status of the daemon, and when I enter jobs, I find no background tasks running. Did my program die? I went on top and found out that my daemon was running. PS Under the discovery is also unable to find this background task. But why did jobs and PS have no background tasks? I am also in the establishment of this background task terminal input jobs, found that the task exists, PS can also be found. The specific reasons are not clear at the moment, and later study.

A process running in a terminal daemon will not be found in a new terminal using the job