UAF issues with recent builds

With recent macOS beta builds (starting last week), where UAF used to work quite well, it is now only sporadically working (mostly not).

Safari is my main and I have the 1Password plug-in installed. Using the little 1Password icon in forms to fill works, but CMD-\ is problematic.

Brave is my secondary and I use it heavily for work. I do not have the 1Password plug-in installed in it by design and have used UAF to great effect for quite a while.

However, lately, when I am in Brave and type CMD-\ the 1P Quick Access window pops up (1Password cannot ever automatically fill AWS logins, sadly), but after selecting the correct item and hitting enter, it will not fill the form as it used to. I have to copy/paste from Quick Access for each field.

Sometimes when I hit enter on a Quick Access entry in Brave the browser screen flashes and nothing happens. Sometimes it seems to bring Safari to the foreground or the Safari window flashes as if it's been activated.

I tried completely quitting 1Password, reloading web pages, relaunching the browsers, disabling the Safari plug-in, rebooting my Mac, etc.

I went through the steps on this page to ensure 1Password has all the noted permissions, etc. https://support.1password.com/mac-universal-autofill/

I tried to switch back to stable channel hoping it may work there, but I am unsure how to safely do that.

1Password for Mac 8.10.18 (81018005)

1Password Version: 8.10.18
Extension Version: 2.15.1
OS Version: macOS 13.5.2
Browser: Brave, Safari