I did an investigation this morning.
I have an iPad7 and an iPhone12.
I went thru all my apps and deleted my iPhone from them.
I then deleted my iPhone as a device.
I logged off the iPad and logged off from the iPhone.
Then I deleted the HE app from my iPhone and my iPad.
I booted the iPhone and the iPad.
I downloaded the HE app from the App Store on the two devices and logged on HE from my iPhone. It created the device of iPhone12.
I sent a push thru HE to my phone. It worked.
I then logged into the HE app on my iPad. It asked me if I wanted to create a new device or use the existing device. I chose existing.
I went to the device (iPhone12) on the iPad and sent a push.
The push went to the iPad instead of the iPhone!
Whatever device you log into last, determines the push and possibly/probably the presence sensor.
Could this be the problem all along with presence?
Most of us have several "computers" we log into to do changes to HE.