Basically it's too many clicks to fill my one-time password in. Typically I will submit a login form with 1Password, which is great, and then I am asked for a one-time password and have to go back to the 1Password menu, open the item up (harder than auto-filling), then copy the OTP.
It's not horrid but it's so dramatically much more work than filling the password itself.
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided
Referrer: forum-search:one-time password