Failing Writes to read-only Geo Secondary Database

The Geo secondary replica database is logging attempts to write to it, despite being read only

2019-03-08_19:03:50 patroni-01-db-dr postgres[44471]:  [2589-2] 2019-03-08 19:03:50 GMT [44471]: [5081-1] STATEMENT:  UPDATE "pages_domains" SET "enabled_until" = '2019-03-15 19:03:50.555449', "verified_at" = '2019-03-08 19:03:50.555623' WHERE "pages_domains"."id" = 142824
2019-03-08_19:03:50 patroni-01-db-dr postgres[44471]:  [2590-1] 2019-03-08 19:03:50 GMT [44471]: [5082-1] ERROR:  cannot execute UPDATE in a read-only transaction