Substraction shader issue

[AnkitCIS]

Hello Seiya,
We have used Unity 2019 and we have got some issue in subtraction shader for that please check this image

, if we will see through SubOp then we will see the behind the SDunitychan_SubReceiver model but if we will add another model SD_unitychan_SubReceiver behind one model then it shows the grey color and but it wrong, it should be shown in real color, please check this image

. but we are thinking it will occur by depth. Please give me a solution to this issue.