I have seen this issue before when a Drupal site is the SSO provider for Discourse. I haven’t seen similar issues with other SSO providers. Is there a Drupal module that you are using for SSO? If so, can you let us know where to find it?
You can hide the “Recently used devices” section with CSS. This might be a good temporary fix for the problem.
.control-group.pref-auth-tokens {
display: none;
}