The symbol which should be shown in the detail page is like the one from master-4 run

https://blueocean.io/blue/pipelines/jenkins-design-language/activity/#master-4

but in the detail view of this run you see

We should use the same symbol in the modal header, so instead the X it should be -

As a side note please validad as well running and other cases that are not as usual as fail/success.