Minecraft 1.6.0.1 has problems with the invisible stuffs with lag on the worlds on androids

I have problems with update aquatic all mobs and skin there body's are completely invisible with some lag when riding a boat in a ocean or river.and lag by killing or mining stuffs. Mojang I know that its only one issue but why every time you fix stuffs the bugs come? All people that play minecraft on android its has problems.