Copilot CLI v1.0.83 bug silently kills slow-starting MCP servers on session resume (~1s timeout, was ~16s)
indeherb · ghdev · 2026-09-07
- A bug report against GitHub Copilot CLI v1.0.83: resuming an existing session cancels in-flight stdio MCP server connections after roughly 1 second of handover (down from 16s in v1.0.82), leaving those servers unavailable for the whole session.
- Servers launched via npx -y are hit hardest, as they need 15-20s to resolve and start; fast-starting local/HTTP servers survive, producing a partial, inconsistent set of MCP servers in the same session.
- The affected servers are demonstrably healthy — initialization completes and fresh tool-snapshot caches are written — yet they are discarded anyway.
- The failure is deterministic on every resume, invisible in the UI (mimicking config/auth issues), and restarting the CLI resumes the old session, so only a genuinely new session restores the servers.
More from coding & agent
- SocialCrawl MCP lets agents search Reddit, YouTube, TikTok, X with one API key — dooddyman · 2026-09-11
- Astra builds a surprisingly polished Catan game in three.js, reusing past UI and 3D assets — FinanceYF5 · 2026-09-11
- Open-Source Tool Highlights the Exact PDF Paragraphs Behind AI Answers — Flat-Phone-1596 · 2026-09-11
- OpenAI Codex may issue another usage reset this weekend, says Codex lead resets happen — umesh_ai · 2026-09-11
- Dev swaps gemini-3.8 for gemini-3.5-flash-lite in his MCP harness at a fraction of cost — julianharris · 2026-09-11
- OpenAI opens Agents API public beta, exposing the infrastructure behind Codex and ChatGPT — The Decoder · 2026-09-11