When you deauthorize a 1Password X device, the account doesn't get removed from the extension. You can still log in with the master password and get access to all the passwords, even though the extension has a connection to the internet and should've been deauthorized. The only indication that the extension has been deauthorized is when new items won't sync.
1Password Version: Not Provided
Extension Version: 1.16.2
OS Version: Not Provided
Sync Type: Not Provided