Game sometimes stops NPCs and Block-Interfaces don´t work

Sometimes, a gameworld gets suddenly strange, which stands for the following things:
-NPCs freeze and cant be killed
-the computer-utilization reaches 100%
-blocks dont drop anything, when destroyed
-blocks, which should activate an interface or call a event, when clicked right, dont do this or do it delayed (workbenches, beds, oven, chests, etc.) Doors work, like normal

What I expected to happen was...:
Game work, like normal

What actually happened was...:
This strange stuff

Steps to Reproduce:
Not possible, it happens randomly