when iam playing minecraft and then when i turn off the screen and i turn the screen back on the game freezes

well you are playing mincraft and you turn off your screen and then when you turn it back on it freezes

when you put lava in the middle of tnts and wait tell the tnts blow up and if you just stay on top of the tnt it pushes you up high in the sky

my game is lagy

when you downlaod a map and when you go in the map it is very lagy

i made one stone axe and on my invetory shows two axes.

some times when i open a chest it stops and crashes on me please fix this

the powered rails got slower on build 4 pleas fix this bug.