It sounds as if something is creating a lot of entity changes or events in HA.
If the app keeps alive for a time , you can log all entity updates and check if there is an entity that’s causing this traffic.
Go ot repair view of any device (you will need at least one). Then activate extended logging:
Go back and refresh. Then there should be some entity updates or events.
Don’t forget to deactivate the extended logging.
If you can’t get into repair view in case the app crashes too fast, the please check the HA logs in developer tools:
If you want to lof entity changed, just listen to “state_changed” events:
I hope that helps.
Edit: You can also check the statistics in device repair function to get an overview about the amout of messages:
The 30sec amount can be a good indicator:
