[keycloak-user] Possible bug when trying to modifying custom storage provider configuraiton?

I'm not sure if this is an issue with my implementation of UserStorageProvider, but I'm running into an issue when trying to edit blank fields in the provider configuration after initial creation. If I create a new instance of my provider and define values for all of the configuration properties there's no issue. But if I leave some of the configuration properties blank, save my configuration, and then try to supply values for those properties later the form submission errors. It looks like the entirely new values in the update get submitted as a JSON object but any modified value gets submitted as a String array. I tried replicating this behavior with the provided ldap provider but it doesn't happen there. Empty input boxes are still present in $scope.instance.config as an empty String array. But when working with my custom provider empty input boxes aren't present in $scope.instance.config at all after the initial provider creation. I'm also not sure how to mark any of my properties as required. I see that the ldap provider has required fields but it looks like this was hard-coded into the HTML form rather than set in the provider configuration. Is that correct? I'm using the lastest code on the 2.5.x branch, it's 2.5.4.Final-SNAPSHOT currently. Thanks