Welcome, @Vikrant577
This is the part that is likely the root issue
Why? Every time you restart the job, it begins back at the very end of the server queue. If you do this often enough, a job may never get a chance to run!
When you next queue your jobs, consider check-marking the box to set an email notification. That way you’ll know when it is done.
Then, longer term, when you move on to using workflows, those will queue all of your jobs at once. This allows data to flow through tools without manual interactions. Plus, these also have notification settings.
More about how jobs at public clusters work
Hope this helps! 