[Nexus 5X Q&A, Help & Troubleshooting] -Happy Feet-:
Hello,

i use the latest Pure Nexus ROM. Since few days Apps like Whatsapp and Waze are crashing.

Catlog give me this errormessage:

03-18 08:27:44.941 I/ActivityManager(1479): START u0 {cmp=com.whatsapp/.HomeActivity} from uid 10294 on display 0

03-18 08:27:45.555 D/WhatsApp(22000): LL_D W [259:ConnectionThread] RECV <success t='1489822065' props='15' creation='1488230678'/>

03-18 08:27:45.576 D/WhatsApp(22000): LL_D W [259:ConnectionThread] SEND <iq id='1' xmlns='jabber:iq:privacy' type='get'><query><list name='default'/></query></iq>

03-18 08:27:45.586 D/WhatsApp(22000): LL_D W [259:ConnectionThread] SEND <iq id='2' xmlns='urn:xmpp:whatsapp:push' type='get' to='s.whatsapp.net'><config/></iq>

03-18 08:27:45.596 D/WhatsApp(22000): LL_D W [269:ReaderThread] RECV <ib from='s.whatsapp.net'><offline count='0'/></ib>

03-18 08:27:45.867 D/WhatsApp(22000): LL_D W [269:ReaderThread] RECV <iq from='491747165042@s.whatsapp.net' type='error' id='1'><error code='404' text='item-not-found'/></iq>

03-18 08:27:45.886 D/WhatsApp(22000): LL_D W [269:ReaderThread] RECV <iq from='s.whatsapp.net' type='result' id='2'><config platform='gcm' id='f6raNzhZ4bM:APA91bHD06fXzcA8lmjLZEc-CTIvwJMwwGQuOuEQw4qIMXL86wwAEdOmozpVl9kcP_7keUqLYqtZ7we6MJW2avgUdePTNNVMgVczwNCQ5lCQnse0bv6GLNmh5oxvwVr4F572O3WeOODv'/></iq>

03-18 08:27:46.411 E/AndroidRuntime(22000): Process: com.whatsapp, PID: 22000

03-18 08:27:46.411 E/AndroidRuntime(22000): java.lang.ClassCastException: android.support.v7.widget.q cannot be cast to com.whatsapp.TextEmojiLabel

03-18 08:27:46.411 E/AndroidRuntime(22000):	at com.whatsapp.kn$e.getView(ConversationsFragment.java:1104)

03-18 08:27:46.411 E/AndroidRuntime(22000):	at com.whatsapp.observablelistview.ObservableListView.onLayout(ObservableListView.java:242)

03-18 08:27:46.425 W/ActivityManager(1479): Force finishing activity com.whatsapp/.HomeActivity

03-18 08:27:46.955 W/ActivityManager(1479): Activity pause timeout for ActivityRecord{f777037 u0 com.whatsapp/.HomeActivity t964 f}

03-18 08:27:48.191 W/ActivityManager(1479): Force finishing activity com.whatsapp/.HomeActivity

03-18 08:27:48.206 W/ActivityManager(1479): Force finishing activity com.whatsapp/.Main

03-18 08:27:48.210 I/ActivityManager(1479): Killing 22000:com.whatsapp/u0a294 (adj 900): crash

03-18 08:28:00.050 I/ActivityManager(1479): Start proc 22153:com.whatsapp/u0a294 for broadcast com.whatsapp/.AlarmBroadcastReceiver

03-18 08:28:00.330 I/WhatsApp(22153): LL_I D [1:main]LoggedFlag.java:26 message_handler/logged_flag/must_reconnect initialize to true

03-18 08:28:00.330 I/WhatsApp(22153): LL_I D [1:main]LoggedFlag.java:26 message_handler/logged_flag/must_ignore_network_once initialize to false

03-18 08:28:00.331 I/WhatsApp(22153): LL_I D [1:main]LoggedFlag.java:26 message_handler/logged_flag/disconnected initialize to true

03-18 08:28:00.332 I/WhatsApp(22153): LL_I D [1:main]MessageHandler.java:188 xmpp/handler/create

03-18 08:28:00.348 D/ActivityThread(22153): Loading provider com.whatsapp.provider.contact: com.whatsapp.contact.ContactProvider

03-18 08:28:00.360 I/WhatsApp(22153): LL_I D [1:main]MessageThumbCache.java:95 messagethumbcache/construct 24576

03-18 08:28:00.365 I/WhatsApp(22153): LL_I D [1:main]ContactsSyncAdapter.java:119 ContactsSyncAdapter/created

03-18 08:28:00.367 I/WhatsApp(22153): LL_I D [228:sync-queue]ContactsSyncAdapter.java:160 ContactsSyncAdapter/queueRequest SyncRequest, type: BACKGROUND_DELTA, isUrgent: false, onlyIfChanged: true, onlyIfRegistered: true, shoudlClearWhatsappSyncData: false, protocols=CSF, callbacks: [id= null, retry= true]

03-18 08:28:00.368 I/WhatsApp(22153): LL_I D [228:sync-queue]ContactsSyncAdapter.java:186 ContactsSyncAdapter/freeze until connection returns

03-18 08:28:00.409 D/Event (22153): No subscribers registered for event class com.whatsapp.g.n

03-18 08:28:00.781 W/com.whatsapp(22153): type=1400 audit(0.0:6961): avc: denied { read } for uid=10294 comm=576861747341707020576F726B6572 name="traces.txt" dev="dm-0" ino=1095586 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:anr_data_file:s0 tclass=file permissive=0

03-18 08:28:00.793 W/com.whatsapp(22153): type=1400 audit(0.0:6962): avc: denied { read } for uid=10294 comm=576861747341707020576F726B6572 name="traces.txt" dev="dm-0" ino=1095586 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:anr_data_file:s0 tclass=file permissive=0

03-18 08:28:01.573 D/WhatsApp(22153): LL_D W [261:ConnectionThread] RECV <success t='1489822081' props='15' creation='1488230678'/>

03-18 08:28:01.590 D/WhatsApp(22153): LL_D W [261:ConnectionThread] SEND <iq id='1' xmlns='jabber:iq:privacy' type='get'><query><list name='default'/></query></iq>

03-18 08:28:01.597 D/WhatsApp(22153): LL_D W [261:ConnectionThread] SEND <iq id='2' xmlns='urn:xmpp:whatsapp:push' type='get' to='s.whatsapp.net'><config/></iq>

03-18 08:28:01.608 D/WhatsApp(22153): LL_D W [271:ReaderThread] RECV <ib from='s.whatsapp.net'><offline count='0'/></ib>

03-18 08:28:01.867 D/WhatsApp(22153): LL_D W [271:ReaderThread] RECV <iq from='s.whatsapp.net' type='result' id='2'><config platform='gcm' id='f6raNzhZ4bM:APA91bHD06fXzcA8lmjLZEc-CTIvwJMwwGQuOuEQw4qIMXL86wwAEdOmozpVl9kcP_7keUqLYqtZ7we6MJW2avgUdePTNNVMgVczwNCQ5lCQnse0bv6GLNmh5oxvwVr4F572O3WeOODv'/></iq>

03-18 08:28:01.873 D/WhatsApp(22153): LL_D W [271:ReaderThread] RECV <iq from='491747165042@s.whatsapp.net' type='error' id='1'><error code='404' text='item-not-found'/></iq>

03-18 08:28:01.885 D/Event (22153): No subscribers registered for event class com.whatsapp.g.d

03-18 08:28:16.740 I/ActivityManager(1479): Waited long enough for: ServiceRecord{dfe509a u0 com.whatsapp/.messaging.MessageService}

03-18 08:28:29.212 D/WhatsApp(22153): LL_D W [263:WriterThread] SEND <iq id='3' xmlns='w:p' type='get' to='s.whatsapp.net'><ping/></iq>

03-18 08:28:29.601 D/WhatsApp(22153): LL_D W [271:ReaderThread] RECV <iq from='s.whatsapp.net' type='result' id='3' t='1489822109'/>

Any idea? Reinstall and clean cache don't solve the issue.