Im guessing to fix this they will have a close out button for each widget. See what happens right now is say you use your map. When you go back to the home screen to go on safari, that map you were just looking at is still running.
Say you then open up 5 safari windows, they are all still running plus your map. Also say you had youtube opened from yesterday, also still running. Because all these run at the same time, (plus the music), the phone can not handle the task at hand (maps, safari) and it justs returns home. Is this better than just shutting off, hell yes, but annoying non-the-less.
My prediction is for the update, they will have some functionality to quit maps or end your session or something like that. This way you wont have tons of "tabs" open whilst doing other things.