Hello guys I need help with CC3 to blender about T pose

I setup perfect T pose in CC3 and exported mesh with (T pose) selected
as tutorial
https://manual.reallusion.com/Character_Creator_3/ENU/3/Content/Character_Creator_3/3/08_Animation/Motion_Layer/Creating_Default_Pose.htm

but when I import this T posed character to blender and press "rest position" it kept change to A pose not T pose.they just added 1 ketframe look like T pose from A pose.

I try to google around internet for hours there's no question or answer or tutorial for it. 

I can't use retarget animation because of this.
any help ??