自动更新时间同步后 源和目标时间不一致

update_at这个列的时间从源库同步过来后，要比源库的该列的时间落后，该chanal下其他表没有发现这个问题，不知道是怎么回事。 表结构如下

CREATE TABLE table_aa ( id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '', code VARCHAR(32) NOT NULL COMMENT '', merchant_id BIGINT(20) UNSIGNED NOT NULL COMMENT '', white_list_id BIGINT(20) UNSIGNED DEFAULT NULL COMMENT '', name VARCHAR(50) DEFAULT NULL COMMENT '', id_card VARCHAR(50) NOT NULL COMMENT '', mobile VARCHAR(20) NOT NULL COMMENT '', birthday DATE DEFAULT NULL COMMENT '', gender VARCHAR(20) DEFAULT NULL COMMENT '', valid_start VARCHAR(10) DEFAULT NULL COMMENT '', valid_end VARCHAR(10) DEFAULT NULL COMMENT '', id_card_front_image VARCHAR(20) DEFAULT NULL COMMENT '', id_card_back_image VARCHAR(20) DEFAULT NULL COMMENT '', id_card_with_head_image VARCHAR(20) DEFAULT NULL COMMENT '', head_image VARCHAR(20) DEFAULT NULL COMMENT '', third_user_no VARCHAR(32) DEFAULT NULL COMMENT '', step VARCHAR(20) DEFAULT NULL COMMENT '', customer_id BIGINT(20) DEFAULT NULL COMMENT '', product_no VARCHAR(20) NOT NULL COMMENT '', ocr_valid_status VARCHAR(50) NOT NULL DEFAULT 'NOT_VALID' COMMENT '', id5_valid_status VARCHAR(50) NOT NULL DEFAULT 'NOT_VALID' COMMENT '', three_valid_status VARCHAR(50) NOT NULL DEFAULT 'NOT_VALID' COMMENT '', other_loan VARCHAR(20) NOT NULL DEFAULT 'NONE' COMMENT '', id_card_op_valid VARCHAR(20) NOT NULL DEFAULT 'NOT_VALID' COMMENT '(枚举)', update_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '', create_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '', external json DEFAULT NULL COMMENT '', core_enterprises TEXT COMMENT '', PRIMARY KEY (id) USING BTREE, UNIQUE KEY uniq_code (code) USING BTREE, UNIQUE KEY uniq_mobile_merchantid (mobile,merchant_id) USING BTREE, UNIQUE KEY uniq_idcard_merchantid (merchant_id,id_card) USING BTREE ) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT=''

原提问者GitHub用户xiaobiaoge