Process started by script does not receive SIGINT

I am on Ubuntu 16.04.5 LTS (AWS) I am creating a python process via this command: nohup python -u main.py > nohup.out 2>&1 & I would like to send a ctrl-c/SIGINT to the process, so I send kill -2 . When I start the process from my terminal, this works fine, the program receives the keyboard interrupt and closes gracefully. When I start the process via a .sh script or via another bash process (e.g. bash -c 'nohup python -u main.py > nohup.out 2>&1 &'). (I believe both methods start the process in the same way), the process does not receive the SIGINT when I send it. SIGTERM (default kill) works normally and closes the process, but does not let the process close gracefully, but I need. What's happening?