Bring my Kindle regularly crash

The processing of this case is not bad and seems well thought out. However, I am preparing degree of the screen in the lowest level still too steep. Now the Kindle Paperwhite is on and not difficult for themselves and the shell itself does not - the two together in the handbag, however, are still clearly noticeable. As the biggest shortcoming, which is why I no longer use the shell, is that my Kindle (when stored in it) constantly crashes. I can only imagine that the magnet, which is built into the shell (when opening / closing the cover of the Kindle is awakened / sent in standby mode) is to blame. This is then manifested in different versions: The backlight is no longer in standby mode; the Paperwhite can not even put it into standby mode; Pages can not be turned over ... Then a restart is due after everything is ok again. Unless you're stuck the Kindle back in its case, then you have after two days the same crap.