Bot TurnContext activity in one-on-one chat

[LeonYasoon]

Version

4.23.1

Describe the bug

When receiving an activity e.g. in a messaging extension in the bot with TurnContext, there used to be an indicator if the activity is in a named group chat or in a one-on-one chat.

This is what the context looks like:

The "isGroup" flag used to indicate wether it's a group chat or a one-on-one chat. Recently, this flag is always true, even for one-on-one chats.

To Reproduce

1. Trigger a messaging extension or similar in a one-on-one chat.
2. Receive the bot turn in backend.
3. Inspect the turn context received.

Expected behavior

The "isGroup" flag should be false for one-on-one chats