For Microsoft Edge there is no browser extension available, so I clicked in 1Password on the small "Auto-Type" button behind the username and selected the correct window (it already was selected properly).
But my username is not filled correctly, the first 2 characters are missing.
This is a problem that can be reproduced.
This seems to be a common problem that also affected my old password manager KeePass.
Before I switched to 1Password I reported the same problem and Dominik (the programmer of KeePass) told ne that there are some users complaining about this and as a work around he will add a short delay before he begins to fill in the username.
Please have a look at this problem and please try to fix it.
1Password Version: 184.108.40.2064
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided