SELECT Grant restricts visibility to referential_constraints table

After upgrading from 10.3.34 to 10.11.8, a SELECT Granted user is no more able to read rows from the referential_constraints table.

I needed to change the GRANT from :

CREATE USER 'readonly'@'%' IDENTIFIED BY 'readonly';

GRANT SELECT ON *.* TO 'readonly'@'%';

FLUSH PRIVILEGES;

To :

CREATE USER 'readonly'@'%' IDENTIFIED BY 'readonly';

GRANT USAGE ON *.* TO `readonly`@`%`;

GRANT SELECT, REFERENCES, CREATE TEMPORARY TABLES, LOCK TABLES, SHOW VIEW ON `some_db`.* TO `readonly`@`%`;

FLUSH PRIVILEGES;

With SELECT GRANT, this query returns empty set :

SELECT * FROM `REFERENTIAL_CONSTRAINTS

With the new GRANT, the same query returns the expected results.

Maybe this is a new feature, but I could not find any reference of this change in the changelogs.