When going to Edit > Find > Show Search Options.
1) Doing a search for "Number of attachments", it will only search one vault... first time, with "All Vaults" selected, it returns no results... after selecting a single vault, it works for that vault, but then selecting "All Vaults" again, it continues to only return results for the previously selected vault.
2) The Search Options disappear if you change to a different vault, or select a category (from the sidebar, it's fine if you use the drop down menu at the top of the window).
3) The Search Options continue to be shown, but are no longer applied, after you delete an item.
4) When the Search Options are shown, it typically has a "Close" button in the top right hand corner, but sometimes it shows "Cancel" and "Save" buttons... where the "Save" button is a bit odd, in that it hides the Search Options, and doesn't seem to do anything else.
Unrelated, but in the "Trash" it would be good to list items in the order they were deleted (most recent first); although it looks like sorting by Date Modified also works (even though I'm not sure you can say a delete item is modified)... and maybe with a "restore" option in the right hand click menu (I didn't notice the restore button at first).
1Password Version: 7.0.BETA-4 (70000004)
Extension Version: Not Provided
OS Version: 10.13.3 (17D102)
Sync Type: DropBox