First, I would like to mention that with EnableWindowMode = 1, everything works correctly, and issues appear only when not using forced windowed mode.

Debug dxwrapper.asi and dxwrapper.ini with EnableD3d9Wrapper = 1.

Rendering partially breaks, vision modes either just show black, or contain artifacts.

I can confirm that using a minimal d3d9 wrapper that just wraps device methods and passes through to the original ones, does not have this issue.

Log:

dxwrapper-splintercell3.zip

Alternative video link: https://imgur.com/jHajMIN