When there isn't an arrow in the inventory the bow moves up and down.
Environment
Windows 7 64 bit
Java 8 update 66
Minecraft 16w02a
MC-95537
Bow is shown strange
Resolved
Duplicate
1
Can confirm. This isn't an issue in the 1.8.x series and might have been introduced along with the dual wielding changes.
Edit: this seems to be a duplicate of MC-82811