When using a File Event to retrieve a list of files to process and the script is using :EXIT (if there is not connectivity for instance), the child jobs of the File Event remains active.
Release : v12.2.5 / v12.3.1
Component : AUTOMATION ENGINE
Solution:
Update to a fix version listed below or a newer version if available.
Fix version:
Component(s): Automation Engine
Automation.Engine 12.2.6 - Available
Automation.Engine 12.3.3 - Available