I'm guessing that a polyline was selected before you had F&S do its thing - since F&S adds to an existing selection, rather than replacing.
Trying hitting escape until nothing is selected, then try again.
If all you want is all text (without any other criteria), then don't bother with F&S ... just select the Text tool and then do a select all (ctrl/cmd-A). Same deal for all tools.
When you search, you'll see F&S as an abbreviation as well as the spelled out phrase. The actalk search engine cannot find anything three characters or less and has other limitations. So, use this Google search that was set up by Vistasp:
http://archicadstuff.blogspot.com/
where you can enter "find and select" in quotes to find the phrase.
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB