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