normally I don't reserve the data on my device that much so first I will try playing with your adive in mind. Then I can give a more detailed explanation but currently it crashes after either one a window of time between 5 to 15 minutes or if the light novel has any fast moving animation. Even short animation if briefly fast can potentially crash it. Am amusing it can be related to your advice and potentially fixed by your advice. If so thanks if not I will make another comment either today or within a week.