ManualTime.expectNoMessageFor does not detect a message during specified period when it exists

[k4ji]

I tried the example test case introduced in https://doc.akka.io/docs/akka/current/typed/testing-async.html#controlling-the-scheduler,
even if I change the first call to manualTime.expectNoMessageFor
from manualTime.expectNoMessageFor(9.millis, probe) to manualTime.expectNoMessageFor(11.millis, probe) or longer period,
It still passes.

import scala.concurrent.duration._
import akka.actor.testkit.typed.scaladsl.ScalaTestWithActorTestKit
import akka.actor.testkit.typed.scaladsl.ManualTime
import akka.actor.testkit.typed.scaladsl.TestProbe
import akka.actor.testkit.typed.scaladsl.LogCapturing
import akka.actor.typed.scaladsl.Behaviors
import org.scalatest.wordspec.AnyWordSpecLike

class ManualTimerExampleSpec
    extends ScalaTestWithActorTestKit(ManualTime.config)
    with AnyWordSpecLike
    with LogCapturing {

  val manualTime: ManualTime = ManualTime()

  "A timer" must {
    "schedule non-repeated ticks" in {
      case object Tick
      case object Tock

      val probe = TestProbe[Tock.type]()
      val behavior = Behaviors.withTimers[Tick.type] { timer =>
        timer.startSingleTimer(Tick, 10.millis)
        Behaviors.receiveMessage { _ =>
          probe.ref ! Tock
          Behaviors.same
        }
      }

      spawn(behavior)

      manualTime.expectNoMessageFor(9.millis, probe)

      manualTime.timePasses(2.millis)
      probe.expectMessage(Tock)

      manualTime.expectNoMessageFor(10.seconds, probe)
    }
  }
}

[k4ji]

To reproduce the behavior in the library's ManualTimerExampleSpec, please duplicate the first test case and change the duration to the first call to expectNoMessageFor as 10.millis or longer (just changing the duration in the first case was not enough to reproduce in my environment)

As I described in #28773, it seems processing a message by TestProbe does not make it before message polling by expectNoMessageFor call, even though there is the exact task in scheduledTask.