This is the same issue as
NPANDAY-243, but it's unclear if it is a regression or was not fixed properly. There were not tests present for it. I couldn't find the fix I closed it for in SCM history or listed under either the JIRA or Codeplex ticket. It doesn't look like it was fixed.
Need to implement the project importer capability to add these from the Msbuild generated location. As the original ticket says, in the future it would be better to be more integrated - by just running the necessary Msbuild task to generate it and then adding it dynamically as a resource in the lifecycle.