NullReferenceException when canceling UnityWebRequest with cancelImmediately = true

[AlexanderLukashin]

NullReferenceException : Object reference not set to an instance of an object.
       at UnityEngine.Bindings.ThrowHelper.ThrowNullReferenceException(UnityEngine.Bindings.ThrowHelper)
       at UnityEngine.Networking.UnityWebRequest.Abort(UnityEngine.Networking.UnityWebRequest)
       at Cysharp.Threading.Tasks.UnityAsyncExtensions+UnityWebRequestAsyncOperationConfiguredSource.MoveNext(Cysharp.Threading.Tasks.UnityAsyncExtensions+UnityWebRequestAsyncOperationConfiguredSource)
       at Cysharp.Threading.Tasks.Internal.PlayerLoopRunner.RunCore(Cysharp.Threading.Tasks.Internal.PlayerLoopRunner)
       at Cysharp.Threading.Tasks.Internal.PlayerLoopRunner:RunCore(Cysharp.Threading.Tasks.Internal)

[AlexanderLukashin]

I found out that this code gives this result. Unity 6000.0.30f1

using UnityWebRequest request = UnityWebRequestTexture.GetTexture("file://" + path, true);
await request.SendWebRequest().ToUniTask(cancellationToken: cancellationToken, cancelImmediately: true);