In https://github.com/jenkinsci/blueocean-plugin/pull/413 you find the background of what should be shown in case of queued freestyle project.

You can reproduce the problem:

• To simulate this I configured my local jenkins to have 0 build runners.
• go to a freestyle project and invoke a run
• click on the queued job it leads to http://localhost:8080/jenkins/blue/organizations/jenkins/freestyle/detail/freestyle/91/pipeline
  but you get
  jenkins-js-extension.js:15999 GET http://localhost:8080/jenkins/blue/rest/organizations/jenkins/pipelines/freestyle/runs/null 404 (Not Found)
  jenkins-js-extension.js:15999 GET http://localhost:8080/jenkins/blue/rest/organizations/jenkins/pipelines/freestyle/runs/91 404 (Not Found)

I think it is caused by the pagination merge, but not 100% sure, but since I closed JENKINS-36642 this week the pagination seems most logical.