Yes but I didnt just force close it from running apps. It was from the battery usage. I think I remember a warning popping up.. but I was pretty tired last night.
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I went to my battery usage screen and force stopped my amazon app. I opened it up again and it worked fine. This was the only app that was open so I closed it, nothing happened. /shrug
I've never had any type of warning with closing apps, but I'm guessing it might've been along the lines of "this app may not work properly". Trying to Google some solutions, but haven't found much. I would just pull the battery, this has helped other users from what I've seen.