I have a job that is started as Promotion action.
When downstream-buildview is turned on, I get :

Started by upstream project "JenkinsTestSuite/1_JTS_View/promotion/PromoteToTested" build number 94
FATAL: null
java.lang.NullPointerException
at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:85)
at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:46)
at hudson.model.listeners.RunListener.fireStarted(RunListener.java:188)
at hudson.model.Run.run(Run.java:1433)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:239)