First time StartRound() is called, everything flows through correctly, including waiting the correct amount of time. Second time, it flows through to the await, but that never returns from the await.

roundmanager.cs

namespace Blah {
  public class RoundManager {
  
    // ... //
        
    /// <summary>
    /// Load up the right round inspector and , activate the appropriate bins and dispensers.
    /// </summary>
    protected async void StartRound(RoundStartEvent StartEvent)
    {
      if (!_GameManager.GameState()) {
        Debug.LogWarning("Attempting to start a round for a game that is not started");
        return;
      }
      
      _GameManager.CurrentGame.AdvanceRound();
      _EventBus.Publish(new RoundCountdownStartEvent());
      
      Debug.Log("before Await");
      await Task.Delay(_Settings.roundStartDelay);
      Debug.Log("after await");
      
      // Check to make sure the game hasn't changed in the rest time
      if (!_GameManager.GameState()) {
        Debug.Log("Game ended after the round start timer was started");
        return;
      }

      _EventBus.Publish(new RoundCountdownEndEvent());

      ResetBins(CurrentRound);
      ActivateDispensers(CurrentRound);

      SetRoundInspector(CurrentRound);
      SetScoringStrategy(CurrentRound);
    }
  }
}