isame [he/him]

I don’t know that the user can do it, or at least I can’t find it. But if you (presumably the admin) goes to the admin dashboard, then devices, and delete the device in question, that should solve your problem. It’s only labeled as browser:user though, so if your user has a lot of devices it might be laborious. Just tested on my local instance and it immediately kicked the device.

I wonder what happens if you spoof your user agent. It’s probably a deeper issue, but might be worth a try.