This is a great question. We noticed that with the Explore and Shop buttons, we were seeing less and less keyword bubbles pop up when searching terms. I too would like to know if keyword bubbles are a thing of the past now? Or are they just minimized. One thing we have been doing since running into this issue, is using keywords from the dropdown menu, when typing in a search term or phrase. Hoping to hear from @PinterestGabby or @PinterestJanice soon!