pcsx2 [BUG]: Armored Core Nine Breaker - Stuck/Broken AI on Some Levels

Describe the Bug

In Armored Core Nine Breaker, missions that feature small floaty enemies that appear from doors/hatches will get stuck in those doors, never leaving their initial spawn location. In some missions that have this issue, frequent hanging occurs too (Hit > Melee 2 for example). This seems to be a long-running issue, as even on 1.6 these same AI are broken.

Here's some examples of what I'm talking about, you can see here on PCSX2 how the AI won't move from spawn. https://youtu.be/-EyFNgUC8fw?t=28

And yet on real hardware, they do leave spawn. https://youtu.be/BY4Dtf6e8po?t=41

I'm not entirely sure if this is an AI-related issue or a collision related issue. I've tried messing around with the rounding/clamping settings to no avail, but there's a chance I'm just doing it wrong.

Reproduction Steps

(Reproduction steps shown in videos)

Start a new game
Go to Training
Select Attack > Judgement

Expected Behavior

AI should leave their spawns and chase the player.

On emulator, they get stuck and never leave the spawn door.

PCSX2 Revision

v1.7.4344 , v1.6.0

Operating System

Windows 10 (64bit)

If Linux - Specify Distro

No response

CPU

i5-7600K

GPU

GTX 1050ti

GS Settings

Default

Emulation Settings

Default (Tested MTVU off)

GS Window Screenshots

(not a GS-screenshot, but a GIF that shows the AI stuck in place.) ezgif-5-8a9a2c8067

Logs & Dumps

No response

Apr 07 '23 00:04 wxvu

Does it occur even on Software renderer?

Apr 07 '23 03:04 Berylskid

Yeah it does. Tried all renderers too.

Apr 07 '23 04:04 wxvu

@forrvalhalla Set the ee to interpreter and see if it solves it

Apr 07 '23 12:04 ghost

Didn't work when I tried it on 1.6. Couldn't find the setting on Nightly, but if it's called Enable Cache then I tried that too.

Apr 07 '23 17:04 wxvu

disabling recompile fixed the bug for me on nightly it's in advanced > Emotion engine > enable recompiler FPS is unplayable without recompiler though

Apr 07 '23 18:04 MercuryAmalgam

can you try other things such as setting the EE clamping to "Extra + Sign" or disabling Fast Memory, INTC Spin, Wait loop etc? maybe increase the EE Cycle Rate to 300%.

See if any of those help