This release fixes a regression specific to 4.0.0-preview1 that affected the OpenIddict validation ASP.NET Core and OWIN hosts and prevented tokens specified in query strings and request forms from being correctly extracted (tokens specified in the Authorization header could still be extracted properly).
As part of this release, the OpenIddict.Client.SystemNetHttp and OpenIddict.Validation.SystemNetHttp packages were updated to explicitly reference the latest Polly.Extensions.Http version to resolve a breaking change introduced between Polly 6.x and 7.x that caused a runtime issue in .NET Framework applications using Polly 7.x instead of Polly 6.x (e.g because a recent version of Microsoft.Extensions.Http.Polly was explicitly referenced by the application).
This release also bumps the referenced MongoDB C# driver package and introduces various improvements - including a breaking change - in the OpenIddict MongoDB entities. For more information, read #1487.