Safari extension is not getting updated with changes in the desktop app

@PaddyTB Thank you for getting back to me with that info.
I was hoping for some clarification on what you meant in your initial post when you said: "restarting 1Password fixes it temporarily but the issue keeps returning". Do you mean the updated or new items only appear temporarily or that they appear and remain there but the syncing issue as a whole is only temporarily fixed after restarting 1Password?

Can you follow these steps to see which accounts and Vaults your Safari extension is accessing:

1. Right click the 1Password icon in Safari's toolbar and choose 'Settings.'
2. Scroll down to the 'Accounts & Vaults' section.
3. Do you see all of your accounts/Vaults there?

Let me know how that goes.