GTA Liberty City Stories 60 FPS code issues

[hammersxo]

I'm playing GTA Liberty City Stories (ISO) (ULUS10041) and when I activate the 60 FPS code, sometimes it does play at 60 FPS, but going through the map, the frame rate cap changes back and disney hub forth to 30 or 45 FPS and maybe back to 60 FPS. Is this a bug with the 60 FPS code, and do other people have this bug? So far I've disabled the code, and played at 30 FPS.

My PC specs aren't the issue, I have an i7 6900k and a GTX 1080 TI. I set the CPU speed in the emulator to 1000 Mhz.

I've never had the frame rate cap change with any other codes in other games. Seems very unusual.