[BUG]: Street Fighter III 3rd Strike (Japan): Visual artifact in software renderer

[Immersion95]

Describe the Bug

When running Street Fighter III: 3rd Strike (Japan) with the software renderer and default settings, a small block/artifact appears on the left side of the screen when the character reaches the edge of the stage/screen.

The issue does not happen when using the hardware renderer at 1x.

I did not test higher upscale settings because it's broken with this game.

Reproduction Steps

1. Launch Street Fighter III: 3rd Strike (Japan).
2. Use the software renderer.
3. Go to training mode and select Ryu as the second player. The artifacts don't appear on every character so stick with Ryu.
4. Move him to the left edge of the screen/stage, you sometimes need to hit him for the bug to appear.
5. Observe the small block/artifact appearing on the left side.

I've also attached save states at the exact moment it appears : sstates.zip

Expected Behavior

No visual artifact should appear on the left side of the screen.

PCSX2 Revision

v2.7.304

Operating System

Windows 11

If Linux - Specify Distro

No response

CPU

AMD Ryzen 5 7600

GPU

AMD 9070 XT

GS Settings

No response

Emulation Settings

No response

GS Window Screenshots

snaps.zip

Logs & Dumps

No response