Bug in TransparentBlt with 32bpp bitmaps and alpha channel

In windows when I call TransparentBlt  using a bitmap with alpha channel, it doesn't matter if the transparent color has the alpha value or not. In ros it needs the exact alpha value to work. I'm attaching a sample bitmap from the LunaInspirat theme that shows the problem. It is a 32bpp bitmap with an alhpa channel. In windows either 0x00FF00FF or 0xFFFF00FF work but in ros the transparency works only if I pass 0xFFFF00FF.
I also attached a sample exe that does the TransparentBlt with 0x00FF00FF.
test2.exe