I haven't touched the code for my app (AirCompare) for months but I'm seeing a new and surprising behavior with it in iOS 26.5.2. (It may have started before this without me noticing.)
My app does some fetching of web data in the background and, when conditions are warranted, sends a local notification to get the user's attention. The weird thing is that now, even after quitting the app - by swiping it up to remove it from the carousel - I'm still getting notifications!
I've tried toggling the iPhone's power and the behavior remains.
This seems like potentially a very serious security issue, that an app can continue to run even after the user has killed it. I haven't tried un-installing the app.
How can I ensure my app is fully "off" after the user kills it?