No stats after promoting standby?

I created a test standby that was recovering from our prod primary via
restored WAL files. When I broke recovery and opened up that test standby,
I saw that records in pg_stat_all_tables for tables that contain many
millions of rows (and have for years) were saying a few hundred rows, with
last_analyze and last_autoanalyze being null. I know this isn't the case
for pg_stat_all_tables on prod.

Do stats not automatically get preserved when a standby is promoted? Did
something go wrong here or should I know/expect to have to manually gather
DB stats after a failover (like we do with major upgrades)?

This is PG 9.2.22 on CentOS.

Don.

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Don Seiler
www.seiler.us