Time line not showing page edit relative actions?

[#1]

Hi,

We are recently upgraded from AEM 6.1 to AEM 6.3 and we have found the below issue after upgrade.The time line((Select a page to display its timeline.) ) shows all the pages published and workflow related actives apart form "Page edited"

Do we have to do any config in osgi? We are not getting any errors also?

[#2]

when i try to edit any page component and submit getting following message:

17.05.2018 05:23:24.969 *WARN* [sling-oak-observation-1178] org.apache.jackrabbit.oak.jcr.observation.ChangeProcessor Error while dispatching observation events for //*[11111b]@org.apache.sling.jcr.resource.internal.JcrResourceListener

java.lang.NullPointerException: null

        at com.day.cq.personalization.impl.TeaserResourceEventHandler.isTeaserEvent(TeaserResourceEventHandler.java:321)

        at com.day.cq.personalization.impl.TeaserResourceEventHandler.handleChange(TeaserResourceEventHandler.java:158)

        at com.day.cq.personalization.impl.TeaserResourceEventHandler.onChange(TeaserResourceEventHandler.java:136)

        at org.apache.sling.resourceresolver.impl.observation.BasicObservationReporter.reportChanges(BasicObservationReporter.java:211)

        at org.apache.sling.jcr.resource.internal.JcrResourceListener.onEvent(JcrResourceListener.java:155)

        at org.apache.jackrabbit.commons.observation.ListenerTracker$1.onEvent(ListenerTracker.java:190)

        at org.apache.jackrabbit.oak.jcr.observation.ChangeProcessor.contentChanged(ChangeProcessor.java:507)

        at org.apache.jackrabbit.oak.plugins.observation.FilteringDispatcher.contentChanged(FilteringDispatcher.java:53)

        at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:134)

        at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:128)

        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

        at java.lang.Thread.run(Thread.java:745)