Create many mutation not connecting relationships

When I run a createMany mutation with multiple objects connecting to the same user only one of the objects is added to the users relationship.

All of the posts however have a relationship to the user.

I would expect the user to relate to all of the posts not just one.

   const userId = existingItem._id.toString();

    const posts = postsData.map(post => ({
        data: {
          author: { connect: { id: userId } }
        }
     }));

    await actions.query(
      `mutation CreatePosts($posts: [PostsCreateInput]) {
        createPosts(data: $posts) {
          id
          author {
            id
          }
        }
      }`,
      { variables: { posts } }
    );

hypothesis: this is occurring because the connect runs in parallel and so the last post overrides the previous connect attempts.

This issue should not occur if I was to run multiple createSingle mutations in a loop.

[SeanDoyleGit]

Here are the schemas

const User = {
  fields: {
    name: { type: Text },
    posts: {
      type: Relationship,
      ref: 'Posts.author',
      many: true
    },
  }
}

const Post = {
  fields: {
    name: { type: Text },
    author: {
      type: Relationship,
      ref: 'User.posts',
    },
  }
}

[timleslie]

I have run some experiments and confirmed that the Arcade release has resolved this issue.