Spotlight 2 letter limit
Spotlight only seems to work with 2 letters for me. (mostly, but with some exceptions it will work with 3)
If I type one letter, it works although the list seems rather limited
If I type two letters, it works although the list seems rather limited
If I type three or more letters it just stays where it was after I typed the second.
If I type 3 letters quickly before it has time to complete a search after entering just one or two letters, it does nothing at all
Search in the Finder works just fine.
Apple TV (4th generation), tvOS 9.1