Terrain is glitchy

Thank you for your report.
However, your ticket has been resolved as awaiting response.

We currently do not have enough information to troubleshoot your issue.
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

Your report will be reopened or properly resolved as soon as we receive this information.

This glitch does not happen to every player