I tap Pleco when it is running in background and it then crashes out to the OS desktop. Pleco is clearly still running (frozen) in background and the only way to reset it is to force an exit then turn off the wifi, turn on the Pleco reset button and fire it up anew; the manual reset will not work if the wifi is on. This only troubles me because it happens repeatedly and frequently, i.e. a few times a day. My question: apart from deleting the app and reinstalling (which I hesitate to do as I am not 100% sure how to retain my flashcard database) is this a known problem and is there something I might try to fix it? I am running the latest OS9.2.1 on a mini iPad and the Pleco installation is up-to-date.