App crashes on fetching a collection which contains field as 'Reference Type'

[VenkatramanRajagopalan]

Bug report

Current behavior:
When trying to fetch documents(containing 'ReferenceType' fields) using the fetchFirestoreCollection() method, app crashes. The logcat shows StackOverflow error on trying to convert the object from gson.toJson() line

Expected behavior:
Either the Document Reference should be fetched from the firebase in circular fashion or the reference path has to be sent to the app

Steps to reproduce:
In firebase Firestore database, create a new document with a reference type field. Fetch the document using the fetchFirestoreCollection() method

Screenshots
Example reference field in a firestore document

Environment information

Ionic:

Ionic CLI : 6.13.1 (C:\Users\venkat\AppData\Roaming\npm\node_modules@ionic\cli)
Ionic Framework : @ionic/angular 5.5.5
@angular-devkit/build-angular : 0.1100.7
@angular-devkit/schematics : 11.0.7
@angular/cli : 11.0.7
@ionic/angular-toolkit : 3.1.0

Cordova:

Cordova CLI : 10.0.0
Cordova Platforms : android 9.0.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 5 other plugins)

Utility:

cordova-res : 0.15.3
native-run : 1.3.0

System:

Android SDK Tools : 26.1.1 (C:\Users\venkat\AppData\Local\Android\Sdk)
NodeJS : v14.15.5 (C:\Program Files\nodejs\node.exe)
npm : 6.14.11
OS : Windows 10

Runtime issue

• Device details
  • OnePlus 7
• OS details
  • Android 10

Related code:
Code used to fetch the collection

this.firestore.fetchFirestoreCollection(collectionName, [], resolve, reject)

Console output

console output

java.lang.StackOverflowError: stack size 8192KB
at org.apache.cordova.firebase.FirebasePlugin.mapToJsonObject(FirebasePlugin.java:2767)
        at org.apache.cordova.firebase.FirebasePlugin.access$3200(FirebasePlugin.java:105)
        at org.apache.cordova.firebase.FirebasePlugin$73$1.onComplete(FirebasePlugin.java:2310)

Other information:
The same collection works without the reference field. It crashes only when the reference field is added.

Thanks in advance.