This bug still exists and I don't believe this topic should be marked as closed. PVA chatbots are designed to receive plain text user input. The expected behavior is for PVA to strip away any 'behind the scenes' formatting and only pass plain text.
Expecting the customer to manually strip hidden formatting by copy/pasting into a notepad is not an acceptable workaround.
This is a bug and needs to be addressed by Microsoft.
Example:
I highlight and copy the text 'REQ693205' from a Teams message I sent earlier:

I then paste this text "REQ693205' into teams and send the message:

And even though it appears to have no formatting, the user response is saved as '\r\n\n\r\nREQ693205\n\n'
This also gets passed onto Power Automate and in my case breaks the flow as it is expecting "REQ693205"

This is frustrating for both developers and end-users and is negatively impacting customer satisfaction and adoption.
This is unexpected, undocumented behavior that needs to be acknowledged as a bug so it can be fixed ASAP.
Thank you