[BUG] renderTexture->saveToFile() bugged for image alpha values, wrong output

[Anywhere-Music-Player]

This issue was reported a long time ago: #18193

Still NOT fixed. ClippingNodeor not whatever: just renderTexture->saveToFile works wrong with any graphics: layers, gradients and sprites.
I have on my scene a LayerGradient and after render it's colors gets changed, dramatically. It's renderTexture output renders wrong image.

Just take examples from this my comment: #18193 (comment).
As you can see - Spriteand LayerGradient are differently rendered on output image!
This is currently same bug for cocos2d-x v3.17.

I can't simply create a screen-shoot of the scene!

RenderTexture *render = RenderTexture::create(WS.width, WS.height);
render->begin();
this->visit();
render->end();
render->saveToFile("render.png");

This code renders me a very different image of what I see. Please help!

@minggo @drelaptop @walzer

upd.: also, setBlendFunc(BlendFunc::DISABLE);works ONLY for render->getSprite() - Sprite object, but when I just do render->saveToFile- it's looks like ignored.

[crazyhappygame]

@KAMIKAZEUA
For screen-shot below code works for me:

    std::unique_ptr<cocos2d::Image> image(cocos2d::utils::captureNode(this));
    image->saveToFile(filePath);

[Anywhere-Music-Player]

@crazyhappygame sorry for late response, I just stop using cocos2d-x. It's dead for me.
No support, no fixes for years. Sadly.