Weird problem with System Sounds after upgrading to Lollipop (N7 2013)

[hsarci]

So strangely, after upgrading to lollipop, the system sounds for the keyboard and home/back/multi-task buttons are carried over from 4.4.2. It's the same exact sounds. When compared to my Nexus 5, the same problem doesn't exist. The system sounds on my Nexus 5 have been updated to the proper lollipop sounds.

Anyone have any ideas?