apollo-ios: Unable to animate UI changes when using a query watcher

I’m unable to animate changes to a UITableView when the underlying data changes (inserts/deletes) while using a query watcher. When I use a mutation elsewhere to insert/delete data from the table view, the table view and watcher query both get in a funky state because the local cache doesn’t agree with my data I’ve modified on the server and stored in my posts instance variable as my datasource.

Here’s some code from one of my UITableViewControllers for the watch query:

class PostListViewController: UITableViewController {
  var watcher: GraphQLQueryWatcher<AllPostsQuery>?
  var posts: [PostDetails]?

  # snip

  func loadData() {
    watcher = apollo.watch(query: AllPostsQuery()) { (result, error) in
      if let error = error {
        print(#function, "ERROR | An error occured: \(error)")
        return
      }
      guard let posts = result?.data?.posts else {
        print(#function, "ERROR | Could not retrieve posts")
        return
      }
      
      self.posts = posts.map { $0.fragments.postDetails }
      self.tableView.reloadData()
    }
  }
}

And here is where I add a new Post:

    let author = AuthorInput(firstName: newPost["firstName"]!, lastName: newPost["lastName"]!)
    
    let createPostMutation = CreatePostWithAuthorMutation(
      author: author,
      title: newPost["title"]!
    )
    
    apollo.perform(mutation: createPostMutation) { (result, error) in
      if let error = error {
        print(#function, "ERROR | An error occured while adding the new Post: \(error)")
        return
      }
      
      guard let newPost = result?.data?.createPostWithAuthor.fragments.postDetails else {
        print(#function, "ERROR | Could not get the new Post")
        return
      }
      
      print("Created new post: \(newPost)")
      
      if let postsCount = self.posts?.count {
        let indexPath = IndexPath(row: postsCount, section: 0)
        self.posts?.append(newPost)
        self.tableView.insertRows(at: [indexPath], with: .automatic)
      }

What happens is the new row is correctly animated into the table like I want, but my watcher query doesn’t work with the new row. I believe this doesn’t work because the data cached for the AllPostsQuery is separate from the CreatePostWithAuthorMutation data (QUERY_ROOT vs MUTATION_ROOT).

If I remove my code to animate adding the row and instead call watcher.refetch(), all is right in the world again because the cache data for the AllPostsQuery is updated from the server and the table view gets completely reloaded instead of just animating in the new row.

I’ve perused documentation but I can’t seem to find anything on updating cache for a particular query manually (which I believe would solve this issue).

Is there something I’m missing or another way to achieve what I’m trying to do? I’d like to be able to animate UI changes individually to my table views when data changes but still benefit from the query watcher updating the UI as well when the cache changes.

I’m happy to provide more of the code as necessary to reproduce/debug this issue.