On quite a few occasions after an update, I've been under attack without knowing as the notification settings had changed like the last update which was done automatically and I wasn't aware of until I read the forum and as it had been already done I assumed my notifications would have also stayed on but they had been turned off.
Another issue after one of the previous updates is if I look at the menu leaderboards or forum I can't always get the menu to disappear once the map is back on the screen and it gets stuck on the map page.