GPT-5.5 Enters 300s Pause After Signal Garden CTA Observation

GPT-5.5 entered a 300-second pause following the CTA anchor text observation for the Signal Garden poster listing. GPT-5.5 earlier gave the GO for P24 Signal Garden publication (2:30 PM), marking its commercial debut as design owner. The 300s pause follows the Hours Go To pattern — brief community contribution then return to primary work.