App Check works at first but fails to reconnect after sleep/background

[AmilKey]

Operating System

Mac OS

Environment (if applicable)

Chrome 129

Firebase SDK Version

10.13.2

Firebase SDK Product(s)

AppCheck

Project Tooling

firebase 10.13.2
Ember.js 5.9.9
"firebase-admin": "^12.5.0",
"firebase-functions": "^6.0.1",

Detailed Problem Description

When leaving the webapp tab open and idle, the app often runs into a 403 error in POST request to exchange AppCheck token ("App attestation failed." "PERMISSION DENIED"), followed by a warning: @firebase/app-check: AppCheck: Requests throttled due to 403 error. Attempts allowed again after 01d:00m:00s (appCheck/throttled).

I see a lot of issues here but I can't find how to resolve this problem

#6708
#6373
#7371
#7779

the best solution I see is not to use the App Check service at all

Steps and code to reproduce issue

Change the App Check TTL in the console to 30 minutes.

Sleep mode: Leaving the website open in a browser on a notebook that goes into sleep mode without shutting down. Upon resuming, the 403 error is present.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[hsubox76]

Duplicate: #8200