Till morning PST 08/26/2025, Gemini 2.5- flash was returning true json structured responses per the prompt. Then it suddenly started sending completely broken responses. Same prompt, same content. Debug logs showed the responses started with “content” instead ~~~json and commas missing. Testing with 2.0-flash showed expected correct response. Has anything changed in 2.5flash today? It was working well for several weeks.
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