[Bug] Android very slow on reconnection to firestore after being backgrounded

[aixaCode]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2022.3.6f1
• Firebase Unity SDK version: 11.4.0
• Source you installed the SDK: .unitypackage
• Problematic Firebase Component: Firestore Database
• Other Firebase Components in use: Auth, Crashlytics, Dynamic Links, Remote Config
• Additional SDKs you are using: Facebook
• Platform you are using the Unity editor on: Windows
• Platform you are targeting: iOS, Android
• Scripting Runtime:IL2CPP
• Pre-built SDK from the website or open-source from this repo: website

[REQUIRED] Please describe the issue here:

When the app is put into background for longer period of time, over 15 minutes, and brought back, on the reconnection to firebase that app is stuck. After around 5 minutes the app is able to recover. This is a major issue, as it affects the startup of the app. This is only happening on Android.

Steps to reproduce:

Repro rate: 100%

1. Put the app into background.
2. Wait 20 minutes
3. Bring it back to foreground.
4. Notice the warnings in the console

If you have a downloadable sample project that reproduces the bug you're reporting, you will likely receive a faster response on your issue.

Relevant Code:

// TODO(you): code here to reproduce the problem

[ehsannas]

Hi @aixaCode. Thanks for reporting. It looks like the issue is with resolving the host. I'm wondering if there's a DNS issue?

[ehsannas]

Would you be able to provide a minimal reproduction code?

[aixaCode]

I will try to prepare something this week.