When I asked my child to create a mine, Targeting coal ore,
It placed some fences, turned the ground under the fenced into dead shrubs, dug the pit down a few blocks, and stopped.

I'm running minecraft 1.12.2 forge version 14.23.5.2768
MCA version 5.3.1

I feel like I should also mention that the child spawned (Via "I have a family" destiny) with a missing texture, and using the new outfit on her fixed most of it, but the head was still a black cube.