Weird App Review OAuth issue

I am submitting my app for review, and got rejected because the reviewer couldn't perform reinstallation (eg: install and uninstall, or install and perform installation again) successfully.

The reviewer told me my app redirected them to a page like this after OAuth : 
(The page you're looking for can't be found)
Screenshot 2021-04-08 at 12.16.32 AM.png

I am scratching my head now as I was unable to replicate this issue , I am able to reinstall my app successfully (via visiting the app URL, or click the "test app on development store" button on partner portal). This error page seems on the live Shopify App Store, which my app shouldn't have control over!

Has anyone encountered this issue before? How did you managed to solve it?

Your help is greatly appreciated, thanks for taking the time to read this

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