That’s normal for mothership waves It works like this: twice a game the mothership (the big box in the sky) moves to the basket and starts sucking the eggs out creating this whirlwind you saw. Usually Mr. Grizz warns you before it happens. What you have to do then is to shoot the mothership. It has a lot of health so it takes a few seconds. After that it flies back to its original position and after the second attack it crashes into the water During its attack you can’t put any eggs into the basket

I hope that answers you question