The subject describes nearly the issue. If I select a word in a card while repeating or learning, I can search for this word in the card browser through the context menu of the selection. Normally, the word will be searched in the current deck. At the bottom of the card browser should be offered a link text to search everywhere (‘search all decks’). I am missing this link text since 2.25.1.
Workaround:
Select the search expression on top and press enter. Then the link text appears.