I had previously configured a trigger in a Jenkins job to use the dynamic trigger configuration.  I then unchecked the checkbox, but I still see this job triggering on gerrit repos that are in the referenced dynamic trigger file.  It appears that even though in the XML I see the following:

<dynamicTriggerConfiguration>false</dynamicTriggerConfiguration>

It is still referencing the triggers that are configured in the file in the URL.

If I recheck the dynamic trigger box, I can clear out the URL, then uncheck the box again. But then I see the following error on the main job page:

Problem with Gerrit dynamic trigger configuration:MalformedURLException when fetching dynamic trigger url: The gerritTriggerConfigUrl is empty

This is very easy to reproduce.