[Bug] Agent count mismatch between CLI output and UI display

Bug Description
Model says "now launching 6 subagents..." then the UI only says "2 Agent agents launched", but it did in fact start 6

Environment Info

• Platform: linux
• Terminal: alacritty
• Version: 2.1.68
• Feedback ID: 53db56d8-20c3-4d51-b76b-0eb012a0ea7f

Errors

[{"error":"Error: 1P event logging: 221 events failed to export (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\n    at queueFailedEvents (/$bunfs/root/claude:6263:2654)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:21.399Z"},{"error":"Error: {\"message\":\"Failed to export 221 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\",\"originalLine\":\"6263\",\"originalColumn\":\"1713\",\"line\":\"6263\",\"column\":\"1713\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 221 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\\n    at doExport (/$bunfs/root/claude:6263:1713)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2401:25029)\n    at <anonymous> (/$bunfs/root/claude:119:92465)\n    at MM0 (/$bunfs/root/claude:119:93009)\n    at <anonymous> (/$bunfs/root/claude:120:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:21.399Z"},{"error":"Error: 1P event logging: 212 events failed to export (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\n    at queueFailedEvents (/$bunfs/root/claude:6263:2654)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:31.580Z"},{"error":"Error: {\"message\":\"Failed to export 212 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\",\"originalLine\":\"6263\",\"originalColumn\":\"1713\",\"line\":\"6263\",\"column\":\"1713\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 212 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\\n    at doExport (/$bunfs/root/claude:6263:1713)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2401:25029)\n    at <anonymous> (/$bunfs/root/claude:119:92465)\n    at MM0 (/$bunfs/root/claude:119:93009)\n    at <anonymous> (/$bunfs/root/claude:120:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:31.580Z"},{"error":"Error: 1P event logging: 123 events failed to export (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\n    at queueFailedEvents (/$bunfs/root/claude:6263:2654)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:42.335Z"},{"error":"Error: {\"message\":\"Failed to export 123 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\",\"originalLine\":\"6263\",\"originalColumn\":\"1713\",\"line\":\"6263\",\"column\":\"1713\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 123 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\\n    at doExport (/$bunfs/root/claude:6263:1713)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2401:25029)\n    at <anonymous> (/$bunfs/root/claude:119:92465)\n    at MM0 (/$bunfs/root/claude:119:93009)\n    at <anonymous> (/$bunfs/root/claude:120:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:42.335Z"},{"error":"Error: 1P event logging: 122 events failed to export (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\n    at queueFailedEvents (/$bunfs/root/claude:6263:2654)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:54.794Z"},{"error":"Error: {\"message\":\"Failed to export 122 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\",\"originalLine\":\"6263\",\"originalColumn\":\"1713\",\"line\":\"6263\",\"column\":\"1713\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 122 events (status=429, code=ERR_BAD_REQUEST, Request failed with status code 429)\\n    at doExport (/$bunfs/root/claude:6263:1713)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2401:25029)\n    at <anonymous> (/$bunfs/root/claude:119:92465)\n    at MM0 (/$bunfs/root/claude:119:93009)\n    at <anonymous> (/$bunfs/root/claude:120:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-04T14:59:54.…

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