Cancel subscription not working in Apple Settings for TestFlight

[sanaf1333]

Hi, I have deployed my app on Test Flight, I have two subscriptions, monthly and yearly. User can have one of them at a time and upgrade, downgrade to the other. Upgrade, downgrade, cancel from the Apple Settings worked fine in the sandbox environment when testing locally. Now when I have deployed the app on TestFlight, I was able to purchase the subscription successfully from my app. Now when I want to cancel my subscription from the Apple Settings it gives me the following error after confirming cancellation, 'Your request is temporarily unable to be processed. Please try again later.' Also the other subscription offer (yearly) is also not shown to which I could upgrade, even though in the sandbox I was able to upgrade downgrade from the settings. Another thing I have noticed is that the app Icon or name is not shown anywhere in settings with the subscription. Instead of app icon only empty square is shown. Even though app icon shows fine everywhere else. Another thing I have noticed is that the subscription renewal rate is 1 day, which is strange because in sandbox it should be 3 or 5 minutes.
Can someone please help me figure out this issue?