This is with 0.28.3

When I use the search widget for a User ID in a SQL query it tells me "No matching first name found":

but when I hit enter the first name clearly was found because it shows up on the screen.

Steps to repro:

1. Connect the Metabase database (I'm using Postgres)
2. Create new SQL question using this SQL:

   SELECT COUNT(*)
   FROM core_user
   WHERE {{user}}

3. Wire up user param as Field Filter on core_user.id with Filter Widget Type of ID. No default value
4. Try to use User search widget and type in the ID of a User
5. "No First Name Found" pops up in widget
6. Hit enter to choose ID
7. First name shows up