How to suppress or capture log messages associated with MTMD?

[gordon-vart]

I am doing image processing but when executing the inference it is generating console output which I cannot suppress.
This function mtmd_helper_eval_chunk_single in llama.cpp is getting call which then does logging, but this is getting bypassed from the llama log setting callback below.
LOG_INF("%s slice encoded in %" PRId64 " ms\n", name, ggml_time_ms() - t0); is being called within llama.cpp.

I am using llamasharp but I am unable to capture and suppress this message using  NativeLogConfig.llama_log_set((level, message) =>
 {
     // Leave empty to completely swallow native logs
 });

Any help would be appreciated. thanks