Akka.Hosting.TestKit: `AwaitAssertAsync` only runs once

[Aaronontheweb]

Version Information
Version of Akka.NET? 1.5.0
Which Akka.NET Modules? Akka.Hosting.TestKit

Describe the bug

await AwaitAssertAsync(async () =>
{
    var r = await testActorRef.Ask<string>(new MyTestActor.GetData(), TimeSpan.FromMilliseconds(100));
    r.Should().Be("BackgroundService started");
}, RemainingOrDefault, TimeSpan.FromMilliseconds(150));

The above assertion runs once and then quits.

[Arkatufus]

Could not reproduce the issue. Could it be that RemainingOrDefault returns a very short TimeSpan?