Steps to reproduce.

1. Run a test which attaches files with JUnit Attachments Plugin.
e.g. https://gist.github.com/miyajan/fca9dbdd76860360fe6d4d6a081efb18
2. Access to the page at the method level.
e.g. http://your-jenkins.example.com/job/attachments-test/1/testReport/com.example.miyajan/AttachmentsTest/testScreenshot/
→There is no links to the attachments.

I confirmed that there are links in 1.2 and not in 1.3 and 1.4.2.
This is a degraded bug.

FYI, there are links in the page at the class level in all versions.
e.g. http://your-jenkins.example.com/job/attachments-test/1/testReport/com.example.miyajan/AttachmentsTest/