routine_definition in information_schema.routines loses tablename if it starts with an _ and is not backticked

-- sample to reproduce problem

CREATE PROCEDURE test()

BEGIN

  SELECT NULL FROM _table;

END;

SHOW CREATE PROCEDURE test;

-- `Create Procedure` contains correct table name

SELECT routine_definition FROM information_schema.routines WHERE routine_schema=DATABASE() AND specific_name='test';

-- `routine_definition` contains " SELECT NULL FROM ;" (no table name!)

CREATE TRIGGER test AFTER INSERT ON anytable FOR EACH ROW

BEGIN

SET @x=(SELECT NULL FROM _table);

END;

SHOW TRIGGERS;

-- `statement` is missing _table

SELECT action_statement FROM information_schema.triggers WHERE trigger_name='test';

-- `ACTION_STATEMENT` is missing _table

SHOW CREATE trigger test;

-- SQL Original Statement is correct