Blocks sometimes disappear when placed

The Bug:
Sometimes, when I place blocks in creative mode, they disappear!

Edit: I am now giving more precise details into my problem. This happened to me on a mega spruce tree, specifically on spruce leaf blocks. I think I was placing lanterns. This also happened on a 200mb world, which might have something to do with it.

Steps To Reproduce:
1. Place down a mega spruce tree (4 saplings in a square, bone meal recommended)
2. Attempt to place a block on a leaf block

Expected Results:
The block will place.

Observed Results:
The block sometimes won't place.

Please let me know in the comments if this is not enough.