After I set up 2FA, the mobile version worked fine but for desktop when I right-click in a field and go to Autofill I receive a long list of unrelated logins when it should just display one.
Do you have some example sites/URLs? I would check how you have the URLs and match detection configured on the accounts that are popping up. They must somehow all match the current site 
It’s not just for one site but for all of them that this happpens. Never happened before I set up 2FA.
Also I just noticed another issue. For mobile, the autofill is not working so I have to visit vault to select the login.