Enable Gemma 2 2b thinking in LM studio

Hi All 28cm and E cups,

I was trying to break Gemma 2. I happened to enable Gemma 2 think, the response was blank. I am not sure if it's because I use Qwen3-4b to think first then switch to Gemmma. I think the system prompts play little part.

Any one knows how to recreate such without fail?

I use LM studio 0.3.31.