I have had two recent chat support sessions where the image of the person I am chatting with is not properly scaled. The head/face look all squished and disfigured. Is this a problem with the chat system or Upwork not enforcing proper image size rules for these people? When I click to view the image in a new tab it is correct.
I checked and I'm unable to replicate the issue on your end because I don't have a reference to go by. If you experience the same in the future, please save a screengrab of the issue so that it can be investigated further.
Sorry if this wasn't much help.