I have used the Tor Browser to login to my google account multiple times, and in each instance I am marked as using the same device in "Recently used devices," even if I am connecting via a different exit node. When I connected via the Tor Browser running inside a virtual machine, Google correctly identified me as using a different device.
Scripts are enabled globally in my browser, and cookies are allowed but obviously deleted at the end of a session.
Does my browser have some vulnerability that allows Google to recognize me each time I login?