Hello, Bartimaeus. In Icewind Dale with some mods, the trolls from dragon eye area 2 are immune to acid and fire damage when they faint. The game log says they are immune to any damage that my chars inflicts. I uninstall my mods one by one and found that SRR caused the bug (although the base SR works). Here's my log without SRR (SR was installed before Bardic Wonders, except the spellbooks and spell deflection components).