Steps to reproduce

1. Open https://ci.jenkins.io/blue/organizations/jenkins/Core%2Fjenkins/detail/PR-3082/8/pipeline/ in a new window or tab
2. Click "Artifacts"
3. Press Escape
4. Press Back

Expected result 1: Artifacts view of build
Actual result 1: Pipeline view of build

Further steps:

1. Click "Artifacts"
2. Press Escape

Expected result 2: Artifacts view of build; back button available.

Actual result 2: Activity view of project, but has Pipeline view URL; back button disabled.