Standard mode at low resolution tends to break image structure due to rendering limits. For HD or higher resolutions in ComfyUI, this issue does not occur. I recommend using Qwen Edit 2509 (FP16) over the released standard Qwen Image by Seaart. Set the step count to maximum. If artifacts persist, try lowering the Strength.
This setup may not be ideal for typical Seaart usage, but works flawlessly in ComfyUI.

The Qwen used here is forcibly downscaled, so occasional artifacts may occur.