Our app has a hard limit requiring at least api level 18 (Android Jellybean) to run. But to not have the app crashing when starting the tracking because of some problem with the way the notification is implemented it requires at least api level 20 (Android Lollipop). But even then the location update won't trigger for some reason. It requires api level 25 (Android Nougat) to work at all which is totally unacceptable in my Opinion. Android Marshmellow is still used by a vast of amount of people and to not have it work on that platform just sucks.

Most if not all of the issues come from the background_location package. It just isn't that well maintained and only a small project which makes it not production ready. Reimplementing this isn't an option as long we aren't finding someone to do the ios side of things. We will probably have to fork the libary since the original author seems really inactive.