Sprite pool reusing bug(?)

[damager]

Hi, i'm going to create phaser runner game, but i stuck with one problem. I create a bullets like this:

this.bullets = this.game.add.group();
this.bullets.name = 'bullets';
this.bullets.enableBody = true;
this.bullets.physicsBodyType = Phaser.Physics.P2JS;
this.bullets.createMultiple(100, 'playerBullet', 0, false);
this.bullets.forEach(function(child){
    child.body.setRectangle(25, 35, 0, 0);
    child.name = "bullet";
    child.anchor.set(0.5, 0.5);
    child.body.motionState = Phaser.Physics.P2.Body.KINEMATIC;
    //child.body.debug = true;
    child.body.onBeginContact.add(SimpleGame.prototype.onBulletBeginContact, this);
}, this);
this.bullets.setAll('outOfBoundsKill', true);
this.bullets.setAll('checkWorldBounds', true);

and creating them 5 times at second

this.shotTime.loop(200, SimpleGame.prototype.shotTheEnemies, this);

shotTheEnemies(e:Phaser.TimerEvent)
{
    let bullet: Phaser.Sprite;
    for (var i = 0; i < 2; i++)
    {
        bullet = this.bullets.getFirstExists(false);

        if (bullet)
        {
            bullet.reset(this.player.x -14+(28*i), this.player.y - this.player.height/2-20);
            bullet.body.moveUp(900);
            //console.log(bullet.body.)
        }
    }

}

But in time when bullets hit enemy and i use bullet.kill() some of pool bullets don't have speed(And i can't manipulate them till i use bullet.kill again, BUT i don't know which bullets are lag).

That's not happening when bullets hit the world bounce. Please help)

[damager]

That's not object pool bug, i've found that bug appears when i use bullet.kill() right at the moment when collision is started (OR i'm wrong, cause hard to recreate bug when i slowly move the ship that fires bullets). But i don't know how to fix this and why it appears in that way...Can i somehow clear colliding forces when i use bullet.kill() function? Does someone know? (Plz help, my brain is literally blowing up) Thanks)

[damager]

20 hours fighting with this "bug"...but fixed. Problem was in this line

this.bullet = this.bullets.getFirstExists(false);

That is correct version:

this.bullet = this.bullets.getFirstExists(false, false, this.player.x -14+(28*i), this.player.y - this.player.height/2);

i don't know why, but if i don't set position in this method, and set it up later this "bug" shows up.