wrong binlog timestamps on secondary nodes of a galera cluster

CREATE TABLE `t1` (`id` INT NOT NULL AUTO_INCREMENT,`c1` INT NOT NULL DEFAULT '0',`t1` DATETIME NOT NULL DEFAULT now() ON UPDATE NOW(),PRIMARY KEY (`id`));

insert into t1 (c1) values (1);

update t1 set c1 = 2 where c1 = 1;

select sleep (61);

insert into t1 (c1) values (3);

update t1 set c1 = 4 where c1 = 3; 

#241015  6:26:55 server id 100  end_log_pos 2014 CRC32 0xb2ffc8eb 	GTID 100-100-26 trans

### INSERT INTO `d1`.`t1`

### SET

###   @1=1 /* INT meta=0 nullable=0 is_null=0 */

###   @2=1 /* INT meta=0 nullable=0 is_null=0 */

###   @3='2024-10-15 06:26:55' /* DATETIME(0) meta=0 nullable=0 is_null=0 */

#241015  6:26:55 server id 100  end_log_pos 2233 CRC32 0x435b6af7 	GTID 100-100-27 trans

### UPDATE `d1`.`t1`

#241015  6:27:56 server id 100  end_log_pos 2470 CRC32 0xc4bc0bfa 	GTID 100-100-28 trans

#Q> insert into t1 (c1) values (3)

#241015  6:27:58 server id 100  end_log_pos 2689 CRC32 0xf55e6d7b 	GTID 100-100-29 trans

### UPDATE `d1`.`t1`

#241015  6:18:52 server id 100  end_log_pos 1970 CRC32 0xf27fcb76 	GTID 100-100-26 trans

#Q> insert into t1 (c1) values (1)

#241015  6:23:33 server id 100  end_log_pos 2189 CRC32 0x1c769ec5 	GTID 100-100-27 trans

#Q> update t1 set c1 = 2 where c1 = 1

#241015  6:27:56 server id 100  end_log_pos 2426 CRC32 0x5d1a5f92 	GTID 100-100-28 trans

#Q> insert into t1 (c1) values (3)

#241015  6:26:53 server id 100  end_log_pos 2645 CRC32 0xb6436db4 	GTID 100-100-29 trans

#Q> update t1 set c1 = 4 where c1 = 3

#241015  6:26:55  GTID 100-100-26

###   @3='2024-10-15 06:26:55' /* DATETIME(0) meta=0 nullable=0 is_null=0 */