I set the blend mode only in the green box to test in the editor (1st image) and apparently it was working perfectly. I made a code to generate a list (2nd image), and when the list is created, the blend mode Source Atop doesnt work (3rd image). I run in debug mode and the z-order of the gray rectangle who i created in the code is locked at 0 (3rd image). I've tried to use the same gray rectangle created in the editor, and the same happen. I already tried to set the gray rectangle to botton and the same is happen (3rd image), I've tried to set the green rectangle at the top, and, the same is happen, why ?