When using bundle exec jpi build to generate an HPI, and loading that HPI on Jenkins (started with java -jar jenkins.war), it does not render config.erb for a BuildWrapper.
The relevant HPI can be found here: https://github.com/downloads/jorgenpt/pathignore-plugin/pathignore-plugin.hpi

There are no exceptions in the console, but the view is not rendered: Only a checkbox for my buildwrapper. Checking the checkbox does not render the actual config.erb like it's supposed to.
Running bundle exec jpi server instead will load the config.erb properly.