INSERT IGNORE is not ignoring NOT NULL constraint

INSERT IGNORE should ignore the NOT NULL column constraint but on Columnstore it does not.

DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1(
c1 CHAR(5),
c2 CHAR(10) NOT NULL
)ENGINE=Columnstore;
INSERT IGNORE INTO t1 (c1) VALUES ('hello');
ERROR 1815 (HY000): Internal error: CAL0001: Insert Failed: IDB-4015: Column 'c2' cannot be null.

On Innodb -
INSERT IGNORE INTO t1 (c1) VALUES ('hello');
Query OK, 1 row affected, 1 warning (0.003 sec)

SHOW WARNINGS;
----------------------------------------------------

----------------------------------------------------

----------------------------------------------------
1 row in set (0.000 sec)

SELECT * FROM t1;
---------+

---------+

---------+
1 row in set (0.001 sec)