Particle not showing up when set the scalemode to hierarchy

As title shownn, I was making a 2D game and when I set the particle scalemode to hierarchy so as to fit the size with parent object, the particle disappeared, but then I found out that it is visible if the angle of view is toggled 0-90 degree around the x axis. What is happening? how to let the particle shown up?

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anyone could help me out?