schemarouter returns empty response when querying INFORMATION_SCHEMA.TABLES

if i try to query (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'db_name' via schemarouter , result is null Empty set (0.01 sec)

but if i try to query via readconnroute or readwritesplit , query response correct , i have list of tables from select database.