I play for about 10 minutes then my world goes blue and flickers and all the blocks look untextured.

Put the summary of the bug you're having here

*What I expected to happen was i would play normally
Describe what you thought should happen here

*What actually happened was after about 5-10 minutes the world i was playing on flickered blue and all the blocks went untextured.i made new worlds but this happens to ALL of them.
Describe what happened here

Steps to Reproduce:
I don't know how to reproduce it- the bug just happens every time i play.