[READ] Step 1: Are you in the right place?

• For issues or feature requests related to the code in this repository
  file a Github issue.
  • If this is a feature request make sure the issue title starts with "FR:".
• For general technical questions, post a question on StackOverflow
  with the firebase tag.
• For general Firebase discussion, use the firebase-talk
  google group.
• For help troubleshooting your application that does not fall under one
  of the above categories, reach out to the personalized
  Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Xcode version: 10.1 (10B61)
• Firebase SDK version: 6.0.0
• Firebase Component: Firestore (Auth, Core, Database, Firestore, Messaging, Storage, etc)
• Component version: 1.3.0

[REQUIRED] Step 3: Describe the problem

As Described in the title, the created Listener FIRListenerRegistration will failed if the device-connected router disconnected from Internet and then connect back. (I mean the device connected with router all the time, but the router is disconnected from Internet.)

Steps to reproduce:

Un-plug the Internet cable from Router and then connect it back....

Relevant Code:

Here is a very simple Project I used to testing... I found out Firebase Listener doesn't have this issue but Firestore's one has.
Testing Procject For Firestore.zip