Crash on sirines

I'm getting a crash every time I go into battle with sirines (BGT). It happens about 1 second after the sirine is in LoS (or, even if sending ghast, so there's no LoS). So I guessed that must be connected to scripts. Uninstalling "PnP Fey creatures" got rid of the crash.
Weidu changelog, in case someone wants to investigate:

Mods affecting SIRINE_A.CRE:
00000: ~SIRINESCALL/SETUP-SIRINESCALL.TP2~ 0 0 // The Lure of the Sirine's Call: v13
00001: ~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ 1 2 // Restored Sounds: v8.2.3
00002: ~1PP/1PP.TP2~ 0 210 // 1ppv4: Increased paperdoll object variety (core): v4.1.0 BWP Fix
00003: ~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ 0 3020 // Identify All Items: v16
00004: ~STRATAGEMS/SETUP-STRATAGEMS.TP2~ 0 1000 // Initialise mod (all other components require this): v30
00005: ~STRATAGEMS/SETUP-STRATAGEMS.TP2~ 0 6000 // Smarter general AI: v30
00006: ~ATWEAKS/SETUP-ATWEAKS.TP2~ 0 185 // PnP Fey creatures: v4.42
00007: ~ATWEAKS/SETUP-ATWEAKS.TP2~ 0 310 // Distinctive creature coloring: v4.42
00008: ~ATWEAKS/SETUP-ATWEAKS.TP2~ 0 315 // Distinctive creature soundsets: v4.42
00009: ~XPMOD/SETUP-XPMOD.TP2~ 0 2 // Creature XP Reduction -> Reduce to 25%: 7
00010: /* acted upon in an indetectable manner */~GENERALIZED_BIFFING/GENERALIZED_BIFFING.TP2~ 0 0 // Generalized Biffing: v2.2
00011: /* acted upon in an indetectable manner */~GENERALIZED_BIFFING/GENERALIZED_BIFFING.TP2~ 0 0 // Generalized Biffing: v2.2

Can you edit baldur.ini and add Logging On=1 under [Program Options], then reproduce the crash and post the contents of baldur.err (not baldur.log)?

Since the script seems rather small, could you perhaps try to remove specific blocks to isolate the block(s) that cause the crash?

Still haven't had much time to look at this. But there isn't all that much that could make Whirlwind crash the game. Are you using any strange rendering modes, or mods that mess with animations (1PP, I guess)?

Same thing with elder fire elementals. It appears, and after 1 second the game crashes. Normal elementals are fine.

After "pnp elementals" uninstallation the issue is gone.

I do use animation mods, both 1pp and Infinity Animations. However, the animation of the crashing creature is not changed upon uninstallation.

I do use animation mods, both 1pp and Infinity Animations. However, the animation of the crashing creature is not changed upon uninstallation.

Are your 3D animations options enabled in the baldur.ini file ? Aka open the file with Notepad, copy paste the text to a spoilers and comment outside the spoilers if you think they are... the 1PP REQUIRES you to have the exact option enabled. The 1PP readme in it will say what you are searching, as I forgot it years ago.