Star Ocean hits reserved instruction & has graphics issues only with the GL renderer

### Describe the bug

Both of these issues are caused only when using the GL renderer regardless of the CPU backend. I'm suspecting my GPUREAD and GPUSTAT being kind of rand(). Either that or the game is using VRAM as plain RAM and paging data in and out in a problematic way.

Unfortunately I can't examine either hypothesis at the moment because my computer hanged.

### Expected behavior

None of this should happen.

### Steps to reproduce the bug

Just run Star Ocean

### Operating System

Any

### PCSX-Redux version

Any

### CPU model

Intel Core I7 5500u

### GPU model

Nvidia 840M

### BIOS version

Any

### CPU emulation mode

Recompiler

### Additional information

I really need to make this field optional