The issue of alpha inversion in Render Target !

I want to use SceneCapture2D to capture the scene image, but when I send the RenderTarget to Spout, I can see that the Alpha is inverted. I can see the transparent parts in the RenderTarget, while the opaque parts are missing. I want to know how I should solve this problem, which has been troubling me for a long time. I know that in Unreal, the Alpha is reversed, and methods to invert it have been added to the material, but I cannot use that! Do I need to modify the RenderTarget or the SceneCapture2D code to create a new component to use? I hope everyone can give me some help or advice! I really need it!!!