Sprite Disappears When It Gets Away From Camera.

Hi, I’m making a shooter game with isometric view. Lately I added a enemy called “Dummy”,I created him bcs I needed to test bullet collison ect. But when I move my character and camera down, the enemy sprite disappears but it should still be visible. I think that some camera settings couse that but I cant find anything that makes this happen.
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Could you file a bug report with your project using the Unity Bug Reporter and post the case number here, that would be very helpful, thanks! Sorry, but it is a little difficult to pick out the details with your image.