I just ran into this little layout issue while trying to create a new login from within another app upon signup.
This is on iOS 11.2b2/iPhone X/1Password 6.10 (61000010).
@holgr: Thanks for reaching out! Are you seeing this in each case where you use the 1Password iOS extension, or is it just in this particular situation? I'm not seeing it here, but that may be because I'm using the 1Password beta but not the iOS beta. If it's a particular app, or just as an example, it would be good to know which one. Sounds like it might be easy to reproduce in the right environment.
Quick update here. Confirmed. Hopefully we'll have a fix for this shortly. Thanks for bringing this up!