Blending (multiply, potentially others) is not behaving as expected

[iGerman00]

Please verify the blend modes logic. I assume that every layer blends with every layer below itself, like Photoshop or After Effects, so it makes no sense that it's a solid and uniform red when set to multiply in the example below.

Artemis.UI.Windows.2023-07-10.21.26.02.mp4

Version: 1.2023.0704.0