Since version 1.30 (1.29 still works), all my tests are reported twice, duplicating all test results.
Probably caused by fix JENKINS-48583.

Each suite is reported once, all tests inside it are reported twice (once with the original name and once appended with '_2'; e.g. my.package.name.suite.testCaseOne and my.package.name.suite.testCaseOne_2).

Configured publish report 'fileset includes': */report/test/TEST-.xml

I'm using the Parallel Test Executor plugin to run all my tests in parallel in 6 jobs running on different nodes. Running the tests without this plugin (so not in parallel), the report is ok (no duplicates).

If more information is required please let me know.