Google has fixed the memory leak bug that primarily affected Google Nexus 5 and Nexus 6 users. The bug caused constant app crashes and problems with re-launching apps.
The memory leak issue in Android 5.0 Lollipop was first reported last year and a Google project member stated that the issue will be fixed in a 'Future Release'. Although Google rolled out the Android 5.1 update the bug is still affecting users. The bug caused apps like Google+ to restart on their own, free RAM to drop and even caused some active apps to disappear in the middle of usage.