If you run a build that tries to, for example, checkout scm, or talk to the network, when it is not available, or the github api is rate limited, you won't see any results for it. What should show is the log for the results.

To reproduce:

• Add kzantow/failure-project from github as a multibranch
• Disconnect network
• Run the "passing" branch from the activities tab
• Click on the job that shows up (or the OPEN from toast)
• Follow it along while it fails

It will show the red header, but no log saying what the failure is.

See this in action:

http://www.giphy.com/gifs/l0HlxIeazHUUQitKU

I believe this is as no flow nodes arrive, it should revert to showing the log.