iPhone storage in iOS 9.2
I have an iPhone 5s 16 GB model. I recently updated to iOS 9.2. Upon updating I had some storage issues so I deleted some apps and removed music. Then for some time I had ample space of around 1.6 GB. After 2-3 hours my phone again prompted me that the storage is almost full, so I checked the space and was surprised to find out that the phone was using 11.7 GB(max) and had 0 bytes remaining. I then manually counted the storage and I found out that the actual storage that was being used was only 6392.3 MB. While using iOS 9.1 I did not have any storage issues and had plenty of space remaining with all the apps and music. This is very frustrating. Please help me!
iPhone 5s, iOS 9.2