Hello. So i had this issue on my last single player world. i haven't played that much in this world so i just deleted it (bc i thought it was a single-time issue) and created a new one yesterday. Today i logged in and saw this issue again. Bevore there was just grass and now there is a 16x16 changed area... its really frustrating.
MC-156660
16x16 blocks change after coming back to my singeplayer mode
Resolved
Invalid
0
Optifine is not supported. Only submit bugs if they can be reproduced under a vanilla environment.