The extension helper for the application 1Password, as of 18A336e, is now requesting permission to access the Accessibility portion of Privacy under Security. I don't know why it needs this, but I granted it. Despite that, every time I unlock 1Password for usage, I am prompted with a dialog that the 1Password Extension Helper needs access to this resource. I must open the Preferences Panel or deny it; there is no dismissing the dialog. I don't need to do anything but open it, and can then proceed since it's already been given previous authorisation.
I've filed a bug with Apple just now. Enclosed are two screen shots.
1Password Version: 7.1.BETA-0 (70100000)
Extension Version: 126.96.36.199
OS Version: 10.14 beta (18A336e)
Sync Type: Not Provided