1. APPS list, select app, select Storage, CHANGE from internal to SD card, select MOVE. Display goes back to SETTINGS instead of back to APPS list.
2. APPS disappear randomly from within folders, folders can also disappear. Cannot find anything which appears to act as a trigger, although app update may be involved. Does same even when Home Screen lock is on.
3. App previously moved to SD card will reappear on internal storage after app update. Very rarely will the update be applied to the sd card version.
4. APPS occasionally kick you out, for no apparent reason, when using them and whole device appears to reboot android operating system forcing you to wait for apps to redisplay on home screen. Can happen several times per session.