When I search in the Windows version of the application, it doesn't work for the first part of the title. e.g. if the title of an item is 'Skype Ant' and I type 'Skype' into the search field this item will not be listed in the search results. However if I had an item with the title 'Hello Skype' then that would show up. A search for 'Ant' would show the first item I mentioned.
The problem is only when the search matches the start of the title string!
1Password Version: 4
Extension Version: 126.96.36.1994
OS Version: Windows 10
Sync Type: Dropbox