[Bug] Field type reference in QueryDocumentSnapshot is not an instance of DocumentReference

[mandalornl]

[REQUIRED] Describe your environment

• Operating System version: Ubuntu 20.04
• Browser version: Chrome 86
• Firebase SDK version: ^8.1.0
• Firebase Product: firestore

[REQUIRED] Describe the problem

When querying documents from a collection, the field type reference does not return an instance of DocumentReference anymore. Therefore calling e.g. get() will result in an is not a function error. Example code can be found in the link below.

Relevant Code:

https://stackblitz.com/edit/firebase-issue-sandbox-z9mwhw

[dconeybe]

Thank you for reporting this issue. The stackblitz link was super helpful! At first glance, this definitely appears to be a regression in 8.1.0 (compared to 8.0.2). I'll do some investigation and reply back. Just a heads-up, since it's a long weekend in the US, I may not have a meaningful response until next week.