[Bug] on_turn_error: unhandled error: 'text'

[frankqianms]

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Version

latest

Describe the bug

Using botbuilder-python and teams-ai SDK to build a Teams bot with AI response. When sideloading the bot in the M365 Copilot, on_turn_error will occur if trying to conversation with the bot.
Linked issue: microsoft/teams-ai#2326

To Reproduce

repro-noresponse-in-copilot.mp4

[on_turn_error] unhandled error: 'text'
Traceback (most recent call last):
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\botbuilder\core\bot_adapter.py", line 174, in run_pipeline
    return await self._middleware.receive_activity_with_status(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\botbuilder\core\middleware_set.py", line 69, in receive_activity_with_status
    return await self.receive_activity_internal(context, callback)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\botbuilder\core\middleware_set.py", line 79, in receive_activity_internal
    return await callback(context)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\teams\app.py", line 745, in on_turn
    await self._start_long_running_call(context, self._on_turn)
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\teams\app.py", line 903, in _start_long_running_call
    return await func(context)
           ^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\teams\app.py", line 751, in _on_turn
    self._remove_mentions(context)
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\teams\app.py", line 786, in _remove_mentions
    context.activity.text = context.remove_recipient_mention(context.activity)
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\botbuilder\core\turn_context.py", line 392, in remove_recipient_mention
    return TurnContext.remove_mention_text(activity, activity.recipient.id)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "c:\Users\frankqian\TeamsApps\test11\.venv\Lib\site-packages\botbuilder\core\turn_context.py", line 401, in remove_mention_text
    escape(mention.additional_properties["text"]),
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
KeyError: 'text'

Expected behavior

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