On September 4, 2026, during a real long-running GPT-6 Pro engineering task in the ChatGPT iPad app, the UI displayed “Stopped thinking” multiple times even though the same workflow later continued producing substantial output.
I initially interpreted “Stopped thinking” literally and sent a continuation prompt. The workflow later continued and showed a “Worked for 51m 16s” segment, followed by additional output.
This can make it difficult to tell whether a Pro run has actually terminated and may cause duplicate continuation prompts during long-running work.
I’ve submitted the complete private screenshot sequence and device details to OpenAI Support under Case #14449892.