When the anonymization is enabled and the instance has an element with the name "/", or any other name containing the slash, the folders in the bundle are missed and instead of that, files are generated.

It's possible to have such a name, for example with labels. "/", "a/b", ...

In the zip, you should have:

jenkins-root-configuration-files/build-failure-analyzer.xml

But you get:

jenkins-root-configuration-files*user_steep_lung*build-failure-analyzer.xml

The / is replaced by user_steep_lung.