i was experimenting with mine carts when all of a sudden a zombie came...so i killed and and it dropped rotten flesh right on the rail. when my empty mine cart came around the corner it got stopped by the rotten flesh

What I expected to happen was the mine cart driving through it

Steps to Reproduce:
1. make a track of rails...which kind and how long do not matter.
2. drop any item on the rail..it seriously doesn't matter which one because it works with all of them.
3. Make a EMPTY cart drive against it