Gemini Pro leaks its raw chain of thought, gets stuck in an infinite loop, narrates its own existential crisis, then prints (End) thousands of times

I asked Gemini a simple question about gemma3 12b model and RAG. Instead of just giving me an answer, it dumped its reasoning/chain-of-thought into the output, including what looks like some system prompt instructions and then an infinite loop it couldn't escape. It looked like the model was trying and failing to terminate its own output and eventually filling thousands of lines with text: "(End