The title of the post says it all. I run a Bible Word Study (e.g., for μαθητής) and click the Greek Classics link under the Textual Searches section. The search panel that appears does a search in All Books rather than—as expected—in the Greek Classics.

There is a particular set of books that Logos is evidently searching with the results shown in the screenshot, but when I click the Greek Classics link, the search panel displays the following:

The workaround, of course, is to use the All Books link and change to some suitable collection I already have defined. But this is not the expectation for the software.
Interestingly enough, all of the other Textual Searches links behave as expected.
Logos 25.2.56 MacBook Pro 14-in 2021, Ventura 13.4