onSuccess not called by useDelete/deleteOne in pessimistic mode

[This is a v4 bug, which I hope is still supported, since it's mentioned in the issue template? I did not have time to check if the issue exists in v5 as well.]

What you were expecting:

I'm using the deleteOne function returned by useDelete with the (default) pessimistic mutation mode, and onSuccess and onError callbacks supplied in the options object. One of these callbacks should be invoked after the delete request responds, corresponding to the response code.

What happened instead:

When the DELETE request fails, onError is invoked as expected. When the request succeeds though, onSuccess is not called. It is only called when I change the mutation mode to optimistic.

Steps to reproduce:

Repro: https://stackblitz.com/edit/github-718bhh69?file=src%2Fposts%2FPostList.tsx

Check the post list view; the delete button labeled "ERROR" will fail, logging "ERROR!" in the console. The button labeled "SUCCESS" however will not log "SUCCESS!", even though it does delete the post.

Environment

• React-admin version: 4.16.20
• Last version that did not exhibit the issue (if applicable): did not try v5
• Browser: Vivaldi 7.3.3635.11
• Stack trace (in case of a JS error): n/a

Start with the StackBlitz reproduction at src/posts/PostList.tsx and trace useDelete/deleteOne in pessimistic mode. Verify the SUCCESS and ERROR buttons against React-admin 4.16.20; done means a successful DELETE invokes onSuccess and a failed request still invokes onError.