Whether this is a rendering issue in Blue Ocean or an issue with pipeline-github is unclear, but the URL is: /blue/organizations/jenkins/pipeline-github%2Fcore/detail/PR-88/1/pipeline/1051
Every node in the graph is a green checkmark, making me think they are passing.
The top header is red, making me think that it failed, but it doesn't say anything on the screen to indicate why it is considered a failure. This information should probably be in a prominent location, but because it isn't, I have to assume it's a bug.
There is a similar-sounding report in JENKINS-32146 but I'm not entirely sure it's the same.