This is fresh Opera 74 Stable update, based on chromium version 88.0.4324.150.
It brings another improvement in Search Tabs:
In this update, we’ve changed the display order in Search Tabs. When you first open Search Tabs, recently-closed tabs are at the top of the list, followed by open tabs. However, once you start searching, this will be reversed – open tabs at the top of the list, and recently-closed tabs at the bottom.
This will help you find tabs even faster, as our testing indicates that people most often use keyword search to find one of their many open tabs. At the same time, when people want to find a recently-closed tab, it’s usually the most recent and does not require searching with keywords.
The full changelog is available here.