How can I actually hide some vaults?

Thanks for the screenshot too, I didn't know it was possible to select a specific collection in Quick Access. The icon displayed in Quick Access was the 1Password icon, and not the icon for a collection or the "all vaults" collection (my username), so there was no indication that this is a clickable widget.

BTW, is there a better name for this selection that I'm calling "all vaults", so that I can better explain my interactions?

I have a "work" collection, that includes both the Personal and Work vaults, which are the only ones I want available on my work computer.

Even after selecting this "work" collection in Quick Access, if I choose the open in the 1Password app, it opens with the "all vaults" selected in the app, exposing the items in the vaults I don't want to be available on my work computer.

These are the reproduction steps:

1. Open 1Password app
2. Choose the "work" collection
3. Open Quick Access
4. Choose the "work" collection
5. Type github to search for it
6. Choose "Open in 1Password"
7. 1Password app opens with the "all vaults" collection selected

Note: I see that there's no way to change the icon for the "Personal" vault nor the "work" collection, so the same icon is used for 2 different sets of items, which is confusing.

Note 2: The tooltip for the "change collection" control seems to be broken (blank):