M2M does not load related data in junction

[wellingguzman]

Describe the bug
Fetching the junction collection related record are empty

To Reproduce
Steps to reproduce the behavior:

1. Find a collection with a M2M field
2. Fetch /items/<that-collection>?fields=*.*.*
3. See the junction collection with the IDs, but not the related data.

Expected behavior
M2M relationship should automatically populate the junction table relationship based on the M2M record.

A temporary solution is creating a new Many to one relationship between the junction fields and the related collection.