the result of "isTouchingColor" is wrong of some svg sprite

[linushp]

look at the link :
https://test-world.xiaomawang.com/community/main/compose/ku9M666J

user cannot play the game in scratch 3.0 player ,
but it's working well in scratch 2.0 flash player .

I debugged the scratch 3.0 javascript code .
I guess RenderWebGL.js “isTouchingColor” may be return wrong result .

[linushp]

in the function "isTouchingColor"

if runing in "_isTouchingColorGpuFin" , it will not drawable.isTouching(point) .
so it is not correct

[linushp]

on the CPU path , it will test drawable.isTouching(point) .
on the GPU path , it never test drawable.isTouching(point) .