Very laggy in 1.2.0.2-chunk loading lag NOT solved!

My phone is Samsung Galaxy J5 2016,and my MCPE is still laggy after installing the 1.2.0.2.I have 2Gb RAM,Android 6.0.1,16Gb storage and a Adreno 305 graphic accelerator,and it's very laggy on a 3 Mb WORLD!!!
There are also many bugs,I know it's beta,but please try to solve this INFERNAL lag on little worlds and a little biggger worlds(20 Mb) and the bugs.
Thank you.I am waiting for solutions.