Rendering of semitransparent textures on renderTarget

Semi transparent textures blends with black color when I render it to renderTarget.
And I don’t see possibility of how to avoid this except to set no blending to semi transparent material, but it leads to another issue when I render two semi transparent objects that overplaps one another.

Here is simple example of my issue.

Would it be possible for you to create an example (JSFiddle, CodePen, Plnkr) that demonstrates the problem? Or perhaps share some screenshots?

If this is a genuine problem (and not just a deficiency in WebGL), then it should be reported over on github.

@TheJim01 here is example.