NodeJs app runs again after server daily backup, reach number of processes limit, then 503 error

hi I have a NodeJs app on hosting server with cPanel. I ran app with cPanel 'setup a nodejs app' tab and don't do anything. after one day I have 2 node apps that running on terminal! after 2 days I see 4 apps. after some days these running processes reach the Number of Processes limit and whole website give 503 error cuz of high number of processes. I have to kill processes by cPanel terminal to remove them. what is the problem and how can i solve it? please help me. I think it is cPanel issue