title: Jenkins makes github status stuck when PR
body: <p>I am using Jenkins to build. When I start a PR to a protected branch by an administrator, it always gives github two pending status of context "continuous-integration/jenkins/branch" and "continuous-integration/jenkins/pr-head" and have no detail link to them. It never happens when I make a PR from non-administrator. I don't know what is the reason of it.</p>
  
  <p><a href="https://i.stack.imgur.com/A58wq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A58wq.png" alt=""></a></p>
  
  <p>And a github status of context "continuous-integration/jenkins/pr-merge" always work and is related to the running status of my Jenkinsfile. No matter who performs the PR.
  <a href="https://i.stack.imgur.com/C6hFY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C6hFY.png" alt="enter image description here"></a></p>