I noticed when trying out 1Password 8 that the photos for a couple of vaults were missing. Specifically for the Personal and Shared vaults. All other vaults show the correct photos. I checked and the correct photos for these vaults show in 1P7 on Mac, iOS and the web app.
1Password Version: 8.4.0 (80400052)
Extension Version: 2.1.4
OS Version: macOS 12.0.1