[BUG] Klonoa 2: background elements in stages/cutscenes load up slowly and "pop in" when widescreen patches are in use

[Igetin]

Describe the Bug

In Klonoa 2: Lunatea's Veil (SLUS-20151), when widescreen patches are enabled, some background elements in stages and cutscenes load with a noticeable delay and visibly "pop in". A particularly clear example can be observed in the Empty Sea of Tears stage, both during the intro cutscene and in gameplay.

Reproduction Steps

1. Enable "Apply Widescreen Patches" in Settings → Graphics → Display
2. Launch the game
3. Play e.g. Empty Sea of Tears

Expected Behavior

Background elements should not "pop in" during gameplay or cutscenes.

PCSX2 Revision

v2.7.43

System details

• Operating system: Linux (Fedora 43)
• CPU: AMD Ryzen 7 3700X
• GPU: AMD Radeon RX 6800 XT

Settings

Default settings, but with the "Apply Widescreen Patches" setting enabled.

Screencasts

PCSX2 with widescreen patches (captured on PCSX2 v1.7.3069, but looks the same as in v2.7.43):

klonoa_2_empty_sea_of_tears_slow_bg_asset_loading_pcsx2_v1.7.3069.mov

Real hardware:

klonoa_2_empty_sea_of_tears_real_hardware.mov

[Igetin]

@PeterDelta @F0bes Was there some mistake here? This issue report was for the NTSC-U version (SLUS-20151) of the game. However, even after #733 was merged, the SLUS-20151_2F56CBC9.pnach patch file on the main branch still shows the last change being from 2 years ago.

[F0bes]

You're right, that PR didn't include patches for that serial+crc.

[PeterDelta]

You're right, I thought I'd added it but it seems only the PAL version is available. I'll fix it right away. Thanks for noticing :)