### What this PR does / why we need it? Update the check logic of reinitializing inputbatch, this is a follow-up pr of #3477. `kernel_block_sizes` is a `list[list[int]]` and the original logic will always update `InputBatch` when using hybrid blocks, this pr fixes that ### How was this patch tested? locally test with qwen3-next - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 Signed-off-by: MengqingCao <cmq0113@163.com>