In the current beta (redid my phone Sat and it's a fresh install with sync only to Families), when I search for a password with the search feature, it generally works the first time. Usually I switch apps to paste login info. But when I go back to 1Password to search for something else and X the search text and type something else, it nearly always displays the list (like Favorites) rather than the search results as I type or after I click Search. If I cancel the search and try again sometimes it works, sometimes not. The results usually start to display but they seem to "pop under" the regular screen and get hidden after they flash.
If I cancel search and try again, like I said, it sometimes works, but often it doesn't. Usually if I switch tabs at the bottom to a non-active one like Categories or Organize and search it works fine, but it usually happens again. It seems to be the second search while on a tab, not specific to being on a particular tab. It feels like the issue might show up a bit more on the Favorites tab but that could be confirmation bias since I'm there frequently :-) But I've definitely had the issue from the Organize tab as well on my second search there.
Noticed it quite a lot while reinstalling all my apps and logging back in :-) Fortunately many support embedded 1Password login which is great, but sadly not all!
1Password Version: 6.5 build 650029
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Families