It is not a requirement, it is an optional setting.
It is a safety feature. The old omnipod PDM has the same thing. If you do not interact with it within a certain preset number of hours, it disables the pod.
This is an option for people to choose, so that the pod does not keep spitting insulin out if you are unconscious. Like if you are asleep for 12 hours, you might be in trouble. But 4 hours seems too short.
You can change the number of hours, or turn it off completely.
And here is how to turn it off:
Here is a reference link: