That's crazy - and it isn't TINY!
Did you scroll down below the graph and see what was the major consumer of battery? You should do this!
Is something attempting to do some reporting of your location, or synching something over WiFi?
Is this repeatable?
It is a very aggressive gain.
I had read in forums on VZW's site that people were complaining of their devices backing up to VZW's Cloud. I disabled all that stuff. I'm thinking maybe it's trying to backup, but with the unit in Airplane mode, it's just grinding. That is sooooo odd!
I also went into the settings on Tethering and networks, Mobile Networks, and selected Network Mode LTE/CDMA rather than Global. Other people were claiming that would impact battery drain.
I also changed my Settings | Location to "Battery saving" mode, and only enable "High Accuracy" when I need to use Google Nav/Maps.
Lastly, I find if I charge with my OEM charger, I get better battery longevity than if I charge using a USB port.
But honestly, if you've upgraded your phone and never did an FDR... you might want to consider it now, but AFTER you've backed up your stuff. The FDR might also clear out a rouge program download or setting that may be at root cause.
HTH.