It's never normal for an app to crash, but of course, they do from time to time. I've never seen the shortcut disappear from the homescreen after an app crash, but then again, I'm not that surprised that it could happen. Which app(s) are you talking about? Are you sure they're updated to the latest version? Were they installed from Google Play, Amazon Appstore, or downloaded as an .apk file from some random website?
such as : "free app notifier" . when i power it on , i will get this app has stopped working something like that. every time.
i actually just installed something like amazon store .apk today. i think it is a legit app.
i bought this tablet for only 199 online. it has this problem, then once in a while, everything becomes silent. i wonder if i could have got a defective nexus 7?
You mean Free App Notifier for Amazon? There are a few comments in the Reviews section in Google Play that mention crashes, apparently because of changes Amazon made to its web interface. Fortunately, the developer seems to be working on a fix.