ozzo-dbx: Why transaction not working?

Hi! I tried to rollback transaction, but this has no effect.

In log file I see that ozzo close connection and reopen it after transaction start.

170113 19:51:38	    1 Connect	root@localhost on inframe
		    1 Query	SELECT @@max_allowed_packet
		    1 Query	SET NAMES utf8
		    1 Query	START TRANSACTION
		    2 Connect	root@localhost on inframe
		    2 Query	SELECT @@max_allowed_packet
		    2 Query	SET NAMES utf8
		    2 Prepare	SELECT `id`, `kp_id` FROM `db_movie` WHERE `kp_id`=?
		    2 Execute	SELECT `id`, `kp_id` FROM `db_movie` WHERE `kp_id`=302
		    2 Close stmt	

Is this normal? Log file from mysql: