Incorrect compare latin extended unicode symbol with charset utf8mb4

CREATE TABLE t.table1 (

  t varchar(50) NOT NULL,

  UNIQUE INDEX UK_table1_t (t)

)

ENGINE = INNODB

CHARACTER SET utf8mb4

COLLATE utf8mb4_general_ci;

INSERT INTO table1 (t) VALUES ('AKKUŞSAN');

INSERT INTO table1 (t) VALUES ('AKKUSSAN');