About Actor collision in Niagara Fluids System

I want to use Niagara Fluid System to simulate the effect of fluid being injected into a wine glass

But I encounter the following problem

Figure 1: Using a non-transparent material, the collision frame of the cup is normal

Figure 2: Using transparent material, the collision box becomes abnormal

The materials used are as follows

It is known that if the material Bland Mode is Translucent, the Collider will magically turn into a box Collider (wrapping the model , as shown below)

After changing the material’s Bland Mode to Opaque, the Cup Collider becomes normal again.


Because I want to make an animation that simulates liquid flow in a wine glass
But I encountered this strange problem

Does anyone know what the problem is?
How to solve it? Many Thanks .