Lately (since beginning of this calendar year?) When tapping on app icon it opens a new app window rather than going to the already opened app session like other apps. This allows Facebook to be open 20+ times which could slow the phone. Other apps default to the already opened app session.not sure why Facebook gets this special privilege but it's horrible. Both husband and I have noticed this and we have different model phones. It also loads very slowly or glitches/delays actions.