Azure Bot – Teams channel not forwarding user messages to webhook endpoint

Our Azure Bot Service receives messages fine via Web Chat (Test in Azure Portal), but when users reply in Microsoft Teams, nothing arrives at the messaging endpoint (n8n webhook). The bot can still proactively send messages to Teams – only incoming user messages are not forwarded.

What we checked:

• App credentials valid and not expired
• Teams channel active in Azure Portal
• Messaging endpoint correct and reachable (HTTPS)
• Bot is installed and visible in Teams
• No changes on our end – this was working before

Others affected:

• A related older question also describes the same pattern (Web Chat works, Teams doesn't): https://stackoverflow.com/questions/79918848/response-not-received-at-bot-service/79936410#79936410

Is there a known issue with the Teams channel not forwarding user messages to the messaging endpoint? Any help appreciated.