How do I detect the touch hold on a tile in a tilemap?

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1

Godot Version

v4.3.stable.mono.official [77dcf97d8]

Question

I have two functions: void OnTouch(Vector2I cellPosition) and void OnHold(Vector2I cellPosition). I want to call first one when the player is pressing and releasing a tile, and I want to call second one when player is holding a tile for certain period of time.

This is my implementation:

    private Vector2 initialTapPos;
    private List<Vector2> touchPositions = new List<Vector2>();
    public override void _Input(InputEvent @event)
    {
        if (@event is not InputEventScreenTouch e) 
            return;

        var tilesetEventPosition = this.LocalToMap(e.Position);

        if (!(0 <= tilesetEventPosition.X && tilesetEventPosition.X <= this.Game.Width && 0 <= tilesetEventPosition.Y && tilesetEventPosition.Y <= this.Game.Height))
            return;

        if (e.IsPressed())
        {
            this.initialTapPos = e.Position;
            touchPositions.Add(e.Position);

            Task.Run(() =>
            {
                OS.DelayMsec(1000);
                if (this.touchPositions.Contains(e.Position))
                {
                    OnHold(tilesetEventPosition);
                }
            });
        }
        else if (e.IsReleased())
        {
            if (this.touchPositions.Contains(e.Position))
                this.touchPositions.Remove(e.Position);
            if (this.initialTapPos == e.Position)
            {
                OnTouch(tilesetEventPosition);
            }
        }
    }

OnTouch method works just fine. But OnHold is not working properly. It at times either doesn’t work at all, or it works but affects a tile in the wrong position. How do I fix this?