I swiped down spotlight, wanting to listen to "Dirty Laundry" by Don Henley. (It's an excellent song!) Anyway, I typed in "dirty" and NOTHING showed up. Absolutely nothing, nada, bupkis.
I growled in frustration, opened the music app, went to songs, brought up the search there and typed "Dirty". My song came up, along with "Dirty Deeds" and all the other expected results.
At this point I felt like throwing my phone across the room, but not as much as later on when I pulled down spotlight again, intending to search for something else, and "Dirty" was already typed in, with guess what... the appropriate search results.
Apple, you used to do better. What happened? 🙁