Clojurians Log v2

what might prevent caching of a form? I have

(def spanner-items
  [(java.time.Instant/now)
   (next.jdbc/execute! (:sql/db-datasource system) ["SELECT * FROM items WHERE sav IS NOT NULL;"])])

and my Instant changes on every clerk/show!. it doesn't for

(def savs-table
  [(java.time.Instant/now)
   (next.jdbc/execute! duckconn ["INSTALL vss"])
   (next.jdbc/execute! duckconn ["LOAD vss"])
   (next.jdbc/execute! duckconn ["CREATE TABLE IF NOT EXISTS savs (item_remote_id VARCHAR, sav FLOAT[26])"])])

my first thought is (:sql/db-datasource system) isn't being frozen correctly, but not sure how to confirm