NetMQ async exceptions

NetMQTest.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>

    <IsPackable>false</IsPackable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
    <PackageReference Include="NetMQ" Version="4.0.0.272-pre" />
    <PackageReference Include="xunit" Version="2.4.0" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
    <PackageReference Include="coverlet.collector" Version="1.0.1" />
  </ItemGroup>

</Project>

UnitTest1.cs

using System;
using System.Threading;
using Xunit;
using NetMQ;
using System.Threading.Tasks;
using NetMQ.Sockets;

namespace NetMQTest
{
    public class UnitTest1
    {
        public async Task Method()
        {
            var cts = new CancellationTokenSource();
            using var server = new ResponseSocket("inproc://1"); // bind
            using var client = new RequestSocket("inproc://1"); // connect
            client.SendFrame("Foo");
            var s = server.ReceiveFrameString();
            var task = client.ReceiveFrameStringAsync(cts.Token);
            cts.Cancel();
            await Task.Delay(100);
            try
            {
                (s, _) = await task;
            }
            catch(TaskCanceledException e)
            {
                // Consume
            }
            server.SendFrame(s);

            // This gets a little funky as the results are not deterministic (
            // obviously ;-)), on my machine I get the following:
            // With the Delay above and:
            // await Task.Delay(10); - System.InvalidOperationException : An attempt was made to transition a task to a final state when it had already completed.
            // await Task.Delay(1); - TaskSchedulerException: An exception was thrown by a TaskScheduler. ---> System.ObjectDisposedException: Cannot access a disposed object. (I was not able to verify this one on different computer - I got InvalidOperationException)
            // await Task.Yield(); - No exception
            // With the Delay above commented
            // await Task.Delay(10); - System.InvalidOperationException : An attempt was made to transition a task to a final state when it had already completed.
            // await Task.Delay(1); - System.InvalidOperationException : An attempt was made to transition a task to a final state when it had already completed. (but sometimes no exception is thrown)
            // await Task.Yield(); - No exception
            await Task.Delay(10);
        }

        [Fact]
        public void Test1()
        {
            using var runtime = new NetMQRuntime();
            var task = Method();
            runtime.Run(task);
            if (task.IsFaulted)
            {
                throw new Exception("Failed", task.Exception);
            }
            Assert.Equal(task.Status, TaskStatus.RanToCompletion);
        }
    }
}