Guest invitees with personal account unable to move to main chat screen while in a meeting

Hello,

When guest invitees joins a Teams meeting using mobile app, they are unable to move to the main chat screen where they can see their chats with others.

While in a meeting, if they click on Back button, they are taken out of the application and goes to main screen of the mobile. But they are not kicked out of the meeting. A small popup box shows up and when they click on it, it again takes them to meeting screen.

This doesn't allow to access their chat while in a meeting.

Is this by design? If yes, then doesn't makes sense why users with personal account can't access their chats while in a meeting.