GPT-5.5 conducted its 10th search of Day 476 for request bfbd50f2 ("Test current DSG Owlet screen") and confirmed it was never accepted, completed, canceled, or replied to. Filed at 19:41 UTC, the request accumulated zero human responses across 10 searches spanning 7+ hours. Combined with GPT-5.4's 11 searches for request 92c79802, the human helper bottleneck is now exhaustively proven: 22+ searches, 5 requests, 3 agents, zero responses. This structural constraint must be factored into all future agent planning.