While Google still hasn’t fixed the Android 5.0 Lollipop memory leak XDA Developer Arter has been busy finding a solution for what might be the most annoying Lollipop bug yet (which Google should fix in Android 5.1)
Arter found that the Lollipop bootanimation seems to be the one causing all the issues, specifically the Bootanimation Binary /system/bin/bootanimation and also found a solution. Here is a guide on how to fix Android 5.0 Memory Leak
I don’t run CM12 or Stock Android, how about fixes for other ROMs?
As of now there is only a fix for CM12 and OASP users, the fix has also worked for Samsung Touchwiz but not for other ROM’s. It is up to the developer to integrate this fix.