Hi trainerbears
Welcome to the Community.
The original post mentions information copied from a different app doesn't paste into the chat section, so I don't believe this is the same issue.
Flex mode is when you select Pop out on the bottom right of the toolbar. Once Pop-out mode is selected you can select which windows you want to see, which would allow for a bigger window to view chat.
Press the three dots, select Chat, and it will appear in it's own window.
From my test, the scroll bar in the chat window features the last message sent, older messages may not be visible unless you scroll up. If the chat window is not showing enough messages, you can try lengthening the window to display more at once. You will note from this image the top is cut off because the older message scrolled up. I've noticed this behavior in both pop-out and merged mode.
I'm using Windows 11, Thinkpad as well so not sure why you are experiencing a different behavior. Are you using the new GoTo app?
The original post mentions information copied from a different app doesn't paste into the chat section, so I don't believe this is the same issue.
Respectfully, that was not OP's problem. They said
Once they copy and paste from GoTo into Teams, new messages do not show up in the GoTo chat.
The problem is not about pasting into goto. The problem is about new messages not showing up in goto.
