Converting integers to float numbers returns unexpected results in mariadb

CREATE TABLE t0 (
c0 FLOAT DEFAULT NULL,
c1 TEXT DEFAULT NULL,
c2 FLOAT NOT NULL,
PRIMARY KEY (c2)
);

INSERT INTO t0 VALUES (NULL, ' \nvHr', -1.805790031E9), (NULL, 'nb0otl', 0.007098603), (500216130, 'Wn', 0.020739017), (NULL, NULL, 0.09841974), (NULL, NULL, 0.35942525), (NULL, '362105892', 0.39435965), (NULL, NULL, 0.46104088), (NULL, '6(塄^iD6B', 0.47216758), (NULL, NULL, 0.4847922), (NULL, NULL, 0.6031779), (0.95755357, '864424835', 0.62653536), (NULL, NULL, 0.9029423), (NULL, NULL, 0.9647869), (NULL, NULL, 0.9814666), (NULL, 'f^', 506079200);

SELECT t0.c0 FROM t0 WHERE t0.c0 IS NOT NULL GROUP BY t0.c2;

Expected:
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Result:
MySQL> SELECT t0.c0 FROM t0 WHERE t0.c0 IS NOT NULL GROUP BY t0.c2;
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2 rows in set (0.002 sec)