I am assuming you also facing same issues that my team faced, just sharing some of the issues that causes this!
The main reason your agent acts differently in Teams is that Copilot Studio is like a "sketchpad" that you erase every time you test it. Teams, on the other hand, is like a "notebook" that keeps a record of everything.
Memory Issues (Persistence): In the Studio, the bot forgets you every time you hit "Test." In Teams, it remembers your old conversation. If you changed a rule in your bot, Teams might still be trying to use the old rule from your last chat.
The "Wait" Period (Propagation): When you click "Publish," it isn't instant. It’s like sending a letter, it takes a few minutes for the "new version" of your bot to actually arrive in the Teams "office."
The ID Check (Authentication): In the Studio, the bot knows it's you (the creator). In Teams, the bot has to verify your identity using SSO (Single Sign-On). If the "ID checker" (the Azure Entra ID settings) isn't set up perfectly for Teams, the bot just stops talking.
How to Fix It
If the bot is working in the Studio but breaking in Teams, try these steps in this order:
Clear the Slate: Type /startover in your Teams chat. This is a Session Reset that forces the bot to forget the old conversation and look at your new logic.
Take a 5-Minute Break: After you hit Publish, wait at least 5 minutes before testing in Teams. This gives the M365 Backend time to sync up.
The "Turn it Off and On" Move: If the bot still feels "old," uninstall it from Teams and reinstall it. This forces Teams to download the latest App Manifest (the bot's blueprint).
Check the "ID Badge": Make sure your Authentication Scopes (the permissions) are set up for "Teams and M365." If they are only set for "Web," the bot will fail in Teams every time.
Look Under the Hood: Use Application Insights. It’s basically a flight recorder that tells you exactly which "wire" tripped when the bot crashed in Teams.
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