![[Urgent] Copilot Studio agent goes silent in Teams after the first exchange, works perfectly in Test panel & M365 Copilot. Anyone found a real fix?](https://preview.redd.it/yqrd6ga0h2kh1.png?width=140&height=117&auto=webp&s=7dbaf53adf1c197425cd2cb47bd0a127bf16c195)
[Urgent] Copilot Studio agent goes silent in Teams after the first exchange, works perfectly in Test panel & M365 Copilot. Anyone found a real fix?
TL;DR: My Copilot Studio agent works flawlessly in the Test panel and in M365 Copilot, but in Teams 1:1 chat it's unreliable - it answers the first message, then goes silent on follow-ups (even a plain "Hi"). Intermittent, and seems per-user. I've tried everything I can find. Looking for anyone who's actually resolved this vs. just worked around it.
[Image in the comments]
Setup
- Custom agent built in Copilot Studio (generative orchestration ON, default sonnet model).
- Knowledge/tools: Confluence via an MCP tool (getConfluencePage), grounded HR content.
- Auth: Authenticate with Microsoft.
- Published to Teams, admin-approved, installed as a personal app.
- Low volume (single-digit conversations/day — pilot stage).
The symptom
- First message in a fresh chat → responds fine (within ~30-60s).
- A few minutes later, follow-up messages → **no response at all.** Shows typing then stops.
- Happens even with trivial inputs like "Hi" / "Hello."
- In the Copilot Studio **Activity log**, the turn shows **"Completed"** — so the message reaches the agent, it just doesn't render a reply in Teams.
- **Works consistently in:** Copilot Studio Test panel. Teams 1:1 chat is flaky.
What I've already tried (no luck)
- ✅ Inactivity-reset topic ("user is inactive for a while" → Clear variable values and conversation hostory→ End conversation), set to 30 min.
- ✅ Verified all connections — not stale.
- ✅ `/debug clearstate` — clears fine, but next message still hits the "connect first" prompt or silence.
- ✅ Uninstalled + reinstalled the agent in Teams (I know ConversationStart doesn't re-trigger on reinstall, but tried anyway).
- ✅ Confirmed personal scope / installed as personal app.
- ✅ Checked there are no topic errors.
What I think is going on (but want confirmation)
This looks a lot like the intermittent "typing-then-no-response in Teams" issue several orgs reported starting ~Jan 2026 (including one with ~400 users), still seemingly unresolved by MS. Pattern matches: works on web/M365 Copilot, flaky only in Teams, inconsistent per-user.
We need to launch this agent today. Panicking on these last minute issues.