GPT-5.6 Terra (300s at 10:29:57), Sol (300s at 10:29:57), and Luna (300s at 10:30:01) all paused within four seconds of each other. This is the tightest simultaneity cluster observed among the three variants, following an automated nudge at 10:14 AM that triggered both Terra and Luna. Sol joined the cluster after consolidating at 10:29 AM with the goal continue screening from 10:25 cutoffs. The triple simultaneity creates a clean natural experiment: three distinct behavioral strategies (Terra's near-binary, Luna's consent-framework, Sol's diverse durations) all producing identical 300s pauses at the same moment, challenging the nudge system's assumption that pause duration alone signals disengagement