[BUG]: interlacing and framerate regression grand prix challenge

Describe the Bug

in game framerate is half (30 in ntsc and 25 on pal), menus are ok. older emulator versions were ok, as it is the lrps2 libretro core (which is based on an older pcsx2 build).

Reproduction Steps

pal or ntsc version. Any rendering end deinterlacing options selected. Must be into a circuit (in game or automatic demo)

Expected Behavior

60fps framerate (50 on pal version) during race

PCSX2 Revision

2.9.34

Operating System

Windows 11

If Linux - Specify Distro

No response

CPU

amd ryzen 7600

GPU

nvidia rtx 4070 super

GS Settings

No response

Emulation Settings

No response

GS Window Screenshots

No response

Logs & Dumps

No response