Minecraft 1.11-pre-release1 Broken Heads

hello there Mojang! I have been a fan of you guys for a long time. I have been playing Minecraft for around 5 years now. I am hear because I was testing out you guys' 1.11 pre-release update/snapshot... Now the title is very blunt on what exactly this "bug" is.

The heads are broken... or more specifically the item pictures for the heads (steve,zombie,skeleton,wither skeleton,creeper and dragon head) are backwards!

I laughed when I saw this....
Picture one is when the heads are in the slots of the creative inventory
Picture two is when I moved them to my hot bar inventory
Picture three is when I try to place the ender dragon head and he greets me with a jump scare
Picture four and five is when I am holding the ender dragon head in BOTH hands