Hey Guys,
Sorry if this was a known or posted issue,
I was making a farm, and under that farm was my mine, Pretty much what happened is the dirt and crops fell through the grass, Only half of my 10X10 did this though
All I did to re=produce this was make a mine underground and place a farm on top 
Again Sorry if this is known or a topic is already open about this, Did a bit of searching and couldn’t find anything.