Whenever a form is unpublished manually or unmapped due to changes in form configuration, the form will no longer be automatically removed from the bundle it is a part of but can not be assigned by a staff user.
The form will be visible to admin users in the bundle view of the library.
To assign the form again as part of the bundles, the admin user will need to re-publish/re-map the form within each bundle as needed.
Previously, when a form was unpublished or unmapped it was automatically removed from bundles it was a part of and then needed to be manually re-added to each bundle again before re-publishing/re-mapping.