MCPE Education Edition Mode is breaking Textures

In my minecraft pocket edition 1.2.20.1,
When I turn on education mode in the world options and start the world it makes the textures 4×4.
and a bad quality.and it happens every time I open that world.
Education edition edition textures are Brocken.

My device:
Samsung Galaxy J2. 2016 edition
Model no. SM-J200H