IOS Live query is not working with parse v6

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest version of Parse Server.

Issue Description

Parse live query is not receiving updates when I have updated the parse server to version 6.0. It works fine with version 5 but as soon as we switch to version 6, it stops working. Also, version 6 works fine with Android but not working with IOS.

Steps to reproduce

Actual Outcome

Expected Outcome

Environment

Server

• Parse Server version: 6.0.0
• Operating system: AWS Linux server
• Local or remote host (AWS, Azure, Google Cloud, Heroku, Digital Ocean, etc): AWS

Database

• System (MongoDB or Postgres): MongoDB
• Database version: MongoDB atlas latest
• Local or remote host (MongoDB Atlas, mLab, AWS, Azure, Google Cloud, etc): MongoDB Atlas

Client

• SDK (iOS, Android, JavaScript, PHP, Unity, etc): iOS
• SDK version: 2.8.1
  https://github.com/parse-community/ParseLiveQuery-iOS-OSX

Logs

Start by reproducing the Parse Server 6.0.0 versus 5 behavior with the ParseLiveQuery iOS SDK 2.8.1, using the AWS and MongoDB Atlas environment described. Compare iOS live-query updates with the working Android behavior and collect the missing reproduction steps and logs. Done means iOS receives the expected live-query updates on Parse Server 6.