This happens in sandbox and TestFlight, I don't know about production. I haven't released the update with the in-app purchases yet. I've written feedback in feedbackassistent.

This looks related to my problem with IAP pricing. See this thread. I see the same for one of my in-app purchases. I've set the price to 1.99 € / 1.99 $, but in the app 2.29 € is shown. It looks like it is actually setting the price to another tier. Another possible reason might be an upcoming price change in the App Store. Are you setting the price for the entire app or an in-app purchase?

From what I'm seeing today App Store Connect has recovered. It is much faster today and I can edit my in-app purchases. Nevertheless, the issue with the prices still exists. Maybe we should open another thread to raise awareness on this one.

And I've detected another issue. The interface for setting the price of an IAP is out of sync with what is actually set. For instance, I changed the price to $6.99 and in the app it displayed $7.99. Later I changed it to $5.99 and the app displayed $6.99. I think the frontend is setting the wrong value in the backend.

It looks like the same problem I'm having since yesterday. See here: forum thread. There might be some problems with IAP in App Store Connect.

I have the same issue with sandbox testers that I have added in the past. The only way I could get this working is by adding a new sandbox test user. I've also tried to remove a tester and add them again, but the system would not let me do that. There is always the same error: A user with this email address already exists on this team