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PR #51 moved the auto-match "wait for an opponent" from the lobby matchmaking screen into the open game but did not carry over that screen's poll fallback. The notify hub is best-effort and never replays, the live-stream resubscribe sends no cursor, and the game screen refreshed only from push events — so an opponent_joined dropped while the stream was down (e.g. a mobile suspend) left the starter stuck on "searching for opponent" until they re-entered the game. Unlike opponent_moved/game_over, opponent_joined has no follow-up event to trigger the existing move-count gap refetch. Recover it in Game.svelte: (A) refetch once on stream reconnect (covers the common suspend/resume case and rescues a missed move/game_over too), and (B) poll game.state every 2.5s while still waiting with the stream down (mirrors the old matchmaking startPoll). Add a mock-mode __stream e2e seam and two specs isolating each path, fix the now-stale streamAlive comment, and document the fallback in ARCHITECTURE §10.