Les applications en arrière-plan se bloquent

Donc, cela arrive à presque toutes les applications, quand elles sont en arrière-plan. Les onglets de Chrome se rechargent après avoir rouvert l'application. Des applications comme Ingress donnent l'impression d'avoir été lancées depuis peu. Spotify se plante même lorsqu'il est en arrière-plan et que j'ouvre Chrome.

Donc, avant de réinstaller le téléphone, quel pourrait être le problème ? Je n'ai jamais installé d'applications de nettoyage de la mémoire. J'utilise la version stock 4.4.2 sur un Moto G.

Le journal des pannes de Chrome depuis ADB :

I/ActivityManager(  969): Start proc net.nurik.roman.dashclock for service net.nurik.roman.dashclock/com.google.android.apps.dashclock.DashClockService: pid=18611 uid=10126 gids={50126, 3003}
W/InputDispatcher(  969): channel '4303f310 com.android.chrome/com.google.android.apps.chrome.Main (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
E/InputDispatcher(  969): channel '4303f310 com.android.chrome/com.google.android.apps.chrome.Main (server)' ~ Channel is unrecoverably broken and will be disposed!
I/ActivityManager(  969): Process com.android.chrome (pid 17867) has died.
I/WindowState(  969): WIN DEATH: Window{4303f310 u0 com.android.chrome/com.google.android.apps.chrome.Main}
W/InputDispatcher(  969): Attempted to unregister already unregistered input channel '4303f310 com.android.chrome/com.google.android.apps.chrome.Main (server)'
W/WindowManager(  969): Force-removing child win Window{42ea6618 u0 SurfaceView} from container Window{4303f310 u0 com.android.chrome/com.google.android.apps.chrome.Main}
E/JavaBinder(  969): !!! FAILED BINDER TRANSACTION !!!
W/WindowManager(  969): Failed looking up window
W/WindowManager(  969): java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@42ea6440 does not exist
W/WindowManager(  969):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7968)
W/WindowManager(  969):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7959)
W/WindowManager(  969):     at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1047)
W/WindowManager(  969):     at android.os.BinderProxy.sendDeathNotice(Binder.java:493)
W/WindowManager(  969):     at dalvik.system.NativeStart.run(Native Method)
I/WindowState(  969): WIN DEATH: null

Journal de bord d'Ingress

I/ActivityManager(  969): Process com.nianticproject.ingress (pid 17260) has died.
I/WindowState(  969): WIN DEATH: Window{430e7c68 u0 com.nianticproject.ingress/com.nianticproject.ingress.NemesisActivity}
W/WindowManager(  969): Force-removing child win Window{431d43f0 u0 SurfaceView} from container Window{430e7c68 u0 com.nianticproject.ingress/com.nianticproject.ingress.NemesisActivity}
W/WindowManager(  969): Failed looking up window
W/WindowManager(  969): java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@423cb8b0 does not exist
W/WindowManager(  969):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7968)
W/WindowManager(  969):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7959)
W/WindowManager(  969):     at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1047)
W/WindowManager(  969):     at android.os.BinderProxy.sendDeathNotice(Binder.java:493)
W/WindowManager(  969):     at dalvik.system.NativeStart.run(Native Method)
I/WindowState(  969): WIN DEATH: null