Strange Trial Renderer show up ?

Unity Engine
1

Hi
After update to Unity 2017.3 something strange show up when I shoot bullets

arrow at the left show bullets. the other one show the strange white line that appear after update to new version. My bullet had trial renderer if i turn it off this line disappear. So, how to fix this ?

2

Sounds like a bug. Could you file a bug report please?

3

damn, this mean i will what tell the next update to fix it :face_with_spiral_eyes:.
Look, this bullet is a prefab object with TrailRenderer.