shader problem(transparent part colored)

So, i would add low poly engine flame. I made two cylinders in blender and in unity i added material with Particles/Standard Unlit.
I made image in gimp, but unity added colored top line, in gimp there is no line at all. I changed UV in blender, so geometry will not use upper part. But it is still here:

while there is no red lines in editor:

the problem is that ‘mach-disk’

shader setup and red line on top

and renderer: