holding control causes every block in the loaded sector to go invisible

[Skelliell]

holding control causes every block in the loaded sector to go invisible and all im trying to do is the symmetry lines and change orientation it does this every time i hold ctrl for more then 5 seconds



please someone help

 

[DeadMeerkat]

Shouldn\'t be happening, never happened to me before.

1. If you\'re building on a server, try doing it on single player.

If that fails-

2. try reinstalling you game.