Many thanks for getting back to me, Albert.
I managed to reproduce the first point and the power button press in a small project. I was not able to reproduce the swipe up though - on swipe up, the intent is now executed as well.
Here is the repo with the project:
https://github.com/bobi591/test-alarm-kit
I've also added couple of videos how it works when you press the X button, and how it doesn't when you ignore it doing other things on the screen or press the power button.