Symptoms: Create Item Actions don't run.

There is only one specific known scenario that may cause this: If the Create Item action is inside an Event that contains other actions, and these actions recursively call the same Event.

Explanation: Automation Events may be called recursively based on other Automation Events/actions. If an action causes its own Event to fire again, Create Item actions are skipped to avoid endlessly recursive calls to the same event.

Solution: Separate the Create Item action into its own Event.