llama-server router: a model pinned to one GPU still grabs a CUDA context on every card, so it OOMs when my others are full. Am I missing a flag or is this just how it is?

Running into something annoying with llama-server in router mode (`--models-preset`) and I can't tell if I'm missing a flag or if this is just how it works. My rig is 2x 3090, 2x 4060 Ti (one's unplugged at the moment, riser got repurposed) and a 5060 Ti. I run a single llama-server router that spaw