Bugs to Report

1-Sometimes when I go into the water, everything goes black, without giving anything.

2-When I go out of Minecraft, and leave it open, when I enter again, My Skins, and another player become black, or they bug, appearing several items by the body of the skin.

3-When I exit the minecraft, and leave it open, I enter again, the textures bug out, and become black or pink for some items and blocks.

4-There's a bug that when we crouch under the water, I can not get back, it's crouched ...