Problem

When not logged into 1Password, and the cursor is in an INPUT field on a page, pressing just the Down Arrow causes the 1Password prompt box to appear.

Root Cause

For whatever reason, and only on MacOS, the extension appears to be incorrectly detecting the Command key press state (the actual shortcut is Command + Down Arrow, not just Down Arrow, to "Open or close the category menu."). 

If you hold Command and press Down Arrow, nothing happens (which is not the expected behavior).

Workaround (until 1Password fixes it)

Log into the extension.  The bug seems to only affect it when not logged in, for whatever reason.

Reference Links

https://support.1password.com/keyboard-shortcuts/?mac