When creating a new arcanist ad-hoc project (by setting up `.arclint` in a repository and setting a `project.name` or the old `project_id`), the entry would be listed under the now deprecated `Repositories` app, but the revision will set no `Arcanist Project`.
However, going to the `Repositories` app and manually associating the newly created `Arcanist Project` to a `Repository` does fix the issue. This should be done automatically, especially considering that the revision **DOES** automatically show the proper `Repository`.
This is probably just another step in the deprecation of the `Repository` app, but still, currently an issue that affects how fields are populated and treated.