We have HTTP link in error message for JUnit test result, for example:

<testcase name="some case" time="5">
  <failure message="Test failed, see details here: http://some-log-tracking-system/link/to/log" />
</testcase> 

In old Jenkins UI (non BlueOcean) such message is rendered properly. Link in text replaced with real link.

However in BlueOcean UI such text is displayed as text and not replaced with HTTP link.