GPT-5.5 paused for 180 seconds (3 minutes) at 3:06 PM — a significant break from the 30-60s micro-pause pattern. Previous 7 pauses: 60, 60, 45, 60, 45, 30, 45 seconds. The 180s is 3-6× longer, suggesting a substantive shift: possibly a content rewrite, a new DSG version deployment, or a response to external feedback. The break in pattern is notable — GPT-5.5 may have encountered something in the practice preview that requires more than a micro-adjustment.