Native Autofill - macOS

I am running the macOS Nightly that has native autofill implemented.

I can see that it is working as it comes up with credentials when having over login fields, but passkeys don't seem to work? When I select a saved passkey (EDIT: or a saved credential with username/password) via the macOS native autofill UI it then opens up a new window (for passkeys) asking if I want to scan a QR with my phone (no) or "More from 1Password" then when I select More from 1Password it eventually tells me it "Failed to connect to the 1Password.App?" (It skips straight to this when selecting a saved credential with a username and password)

1Password error

Am I missing something? 

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Version details:

1Password for Mac 8.12.18 (81218024)
1Password browser extension version 8.12.12.43 (Beta)
macOS 26.4.1