Hi @TinyTyke, thanks for following up with us.
Autofill issues stem from a number of sources such as 1Password not properly detecting the sign in form, the app or website not providing sufficient context clues or even things like the on-screen keyboard not reacting as expected.
I would suggest setting Autofill prompts below fields then checking if the filling behavior is more consistent for you:
1. Open and unlock 1Password for Android.
2. Tap the account or collection icon.
3. Tap Settings > Autofill.
4. Tap Display Autofill prompts > Below the fields they relate to.
I will note that I did some testing with the Sam's app and it appears that 1Password cannot fill there regardless of settings. I've reported this to the team.
If your Note 9 is running Android 9 I would also suggest using a native Autofill browser such as Firefox or DuckDuckGo instead of an Autofill compatibility browser such as Chrome or Edge. With Android 9 devices, Autofill from 1Password is more consistent with native Autofill browsers at this time.
Let us know if setting prompts below fields is helpful for you!