Projectile particule appearing at the bottom of the screen

Greetings,

i’ve just made a projectile that fire toward the mouse cursor, which is working, but for a reason unknown to me, an image of the projectile appear at the bottom of the screen when the real projectile reach the upper side of it. Here’s a video to better understand my problem.https://youtube.com/watch?v=Sf8joCzzde0

Thanks for your answer

Can you show your code for the projectile launch and position?