Cancellation of UniTask.Delay( ... cancelImmediately: true ) messed up with another UniTask.Delay() methods

[Silentor]

Hello and thank you for wonerful Task lib for Unity!
Please take a look at sample code:

public class TestBugScript : MonoBehaviour
    {
        private CancellationTokenSource _cts;

        void Start()
        {
            Task1( this.GetCancellationTokenOnDestroy() ).Forget( Debug.LogException );
            _cts = new CancellationTokenSource();
            Task2CancelImmediately( _cts.Token ).Forget( Debug.LogException );
        }

        private async UniTask Task1( CancellationToken cancel )
        {
            while ( true )
            {
                var timeout = 2;
                Debug.Log( $" Task1 desired timeout {timeout}" );
                var timeoutStart = Time.time;
                await UniTask.Delay( TimeSpan.FromSeconds( timeout ), cancellationToken: cancel );
                Debug.Log( $"Task1 actual timeout {Time.time - timeoutStart}" );

                CancelTask2();
            }
        }

        private void CancelTask2( )
        {
            if ( _cts != null )
            {
                Debug.Log( "Cancel Task2 immediately, Task1 Delay() will be broken" );
                _cts?.Cancel();
                _cts = null;
            }
        }

        private async UniTask Task2CancelImmediately( CancellationToken cancel )
        {
            await UniTask.Delay( TimeSpan.FromSeconds( 5 ), cancellationToken: cancel, cancelImmediately: true  );
        }
    }

Task1() check Delay actual timing in a loop. After first succesfull delay it's cancels Task2() which has a Delay with cancelImmediately: true. After this cancellation, delays in Task1 are not more 2 seconds delay:

I maked sure if Task2() delay has cancelImmediately: false, then Task1 delay work as intended.

PS Unity 2022.3.13 Windows 64, UniTask v2.5.3

[hadashiA]

Thank you so much for the code to reproduce the problem.

I fixed it in #557 and it was released today.
I hope you can check it out.