I've also experienced weird memory errors working with Qwen 3.5, though I'm not sure if it's an issue with KoboldCPP or the hardware itself.
Try Gemma-4-Sparse, it's a better model in most aspects anyway.
Okay, so no, the bug is back.
But I have a feeling it's because Koboldcpp isn't up to date. Because when I changed the version of Koboldcpp to install in the settings.json file, to the new one, it fixed it. Incidentally, because the AI was still glitching and saying weird things.
They were talking to each other in the first and third person... in short, it was strange.