Texture bugs

Hello, I'm on Minecraft Pocket Edition and I notice that after installing your latest update on my iPad, the texture pack "Cities" is less realistic. All blocks look pixelated. In addition, I find that my bar or the main (chosen) blocks are set to bugs. Indeed, there are boxes that do not want to fill, and it is enough that I click on a beacon, an oven etc: the blocks change at once and all put on the same block. Thank you.