Hit it multiple times while running PCT for JEP-200. Some tests retrieve Plugin instances from Jenkins instance using the following commands:

• getPluginManager().getPlugin("git") - e.g. GitHub plugin
• Jenkins.getInstance().getPlugin("ownership") - e.g. Ownership plugin. In this case the plugin's production logic fails since it's code accesses the plugin (to be fixed though)

With recent Jenkins cores / JTH both methods ALWAYS return null, and it breaks tests