Well when I‘m done using an app I usually launch multitasking to close out of it. Though I think I’m a bit OCD about not having too many apps open. 😂Always been that way. If you go to multitasking the theory is the most recent app is the app you want to load, so it’s in the center.
if you are on the home screen, the “most recent app” is the last app that was open.
If you are IN an app, the most recent app is the PRIOR app - after all, why would you launch multitasking in order to switch to the app you are already looking at?