Parallel requests cause responses to get mixed

When 2 requests are performed at the same time, there is a possibility that one's response will contain 2 concatenated JSON strings

{"@odata.context":"http://localhost:64149/odata/$metadata#Books(Author())","value":[]}{"@odata.context":"http://localhost:64149/odata/$metadata#Books(Author())","value":[]}

and the other will crash with System.ObjectDisposedException: Cannot write to the response body, the response has completed. Object name: 'HttpResponseStream' or System.InvalidOperationException: Reading is already in progress..

I've created a minimal repo you can clone and try to reproduce the issue. It uses efcore with in memory database but the same happens with SQL Server. I've also added a readme for the few steps required to reproduce the issue.

Tried the same with an Api Controller and had no issues.
NET 5, Microsoft.AspNetCore.OData 8.0.0-preview3, Visual Studio 2019 16.8.3