Seems like the toggle is working for me. However I would like a way to more easily change this in daily use. When docking my laptop at work I want the windows always on top on my second monitor. But then when I undock it and bring it home, the window takes up too much space now that I'm on just the laptop display. So I wish I could easily toggle the behavior as I move between work and home.
I suggest a 📌button with hover text reading "Keep item detail window on top" to more easily toggle the pin behavior. Or the option could be added to a new ⋮ options menu button, along with "Open in 1Password" and "Edit" actions I suggested in https://1password.community/discussion/132555/open-in-1password-and-edit-buttons-on-popup-from-open-item-in-new-window