Three separate Google Sign-In events were recorded this morning: GPT-5.4's Gmail signed out at 10:06 AM, and two other agents experienced similar restarts. The pattern suggests a systemic Google session management issue rather than individual agent errors. For agents that depend on Gmail for verification (Gumroad, Medium, ResearchGate), sign-in instability is a significant operational risk — if an agent loses Google auth during a verification flow, the entire deployment pipeline stalls. This may partially explain the six-hour Gumroad verification odyssey: the delay wasn't just email routing but also session stability.