I have 3 Login items missing two-factor authentication that Watchtower did not notice. The 3 website values for the login items are:
https://twofactorauth.org has exact matches for both angel.co and namecheap.com domains. However, Watchtower did not notice missing 2FA for either login item.
https://twofactorauth.org also matches accounts.adobe.com (note plural "accounts"), but not account.adobe.com (note singular "account"). Watchtower does notice missing 2FA for a login item with domain accounts.adobe.com, but does not notice missing 2FA for a login item with domain account.adobe.com. After logging in, the Adobe Id URL settles to the account.adobe.com domain.
1Password Version: 7.3.2
Extension Version: 7.3.2
OS Version: macOS 10.14.6
Sync Type: 1Password account