The latest Windows beta is still taking a pretty cavalier attitude to secure notes. I've noticed that if I create a note and forget to click Save I'm almost certain to lose it. Specifically if I lock 1Password (or it locks itself), or I close the window completely with a note in edit mode I lose the edits without any warning! It's quite easy to do too because the view and edit layouts are virtually the same.
I've also noticed an issue when I delete an item: if I've restricted the list of items with a search and then I delete one of the search results the list reverts to "all items" but my search term remains in the textbox at the head of the list.
There also still a lot of wasted space in the layout of the main window - especially when viewing notes, and still a lack of word wrap. But I see from your reply to someone else this isn't a priority at present. A "pop out" window for notes would be useful too as I often want to position a note along-side another window that I'm working with.
1Password Version: 6.5.396d
Extension Version: Not Provided
OS Version: Win 10 Pro x64 1607
Sync Type: 1Password Integrated Cloud