I ran into an odd situation with the Android app on the main lock screen when I first got my Note 7. When typing out your master password, there's a noticeable lag and dropped frames with each keypress. Entering it with GPU profile enabled, the problem is particularly noticeable (especially when shifting cases or switching keyboard layers, such as for numbers/symbols). The profile indicates mostly command issues topping the bar out. I wanted to provide a screenshot or GIF (entering a fake password, of course), but I can't do so for the 1Password lock screen.
Issue is present when using the latest version of Google Keyboard (220.127.116.11065177-arm64-v8a). There's some slight lag with the Samsung keyboard as well, but it's barely noticeable. And I haven't run into the issue using the keyboard elsewhere, or even in other views for 1Password. Just the lock screen.
I realize that part of this is likely out of your hands for the most part, and that the Note 7 (well, Samsung devices in general) are pretty notorious for frame rate and performance issues despite the hardware they use, but I figured I'd file a bug report just the same. Now I just need to take care of swapping the Note out due to the recall. This bug's pretty tame compared to explosive batteries .
1Password Version: 6.4 for Android
Extension Version: Not Provided
OS Version: Android 6.0.1
Sync Type: Dropbox