I have an 16G iPhone 5s with iOS 10.1 that is very quickly eating up space to "Zero KB". When checked in "Manage Storage" the apps definately doesn't add up to 11.9 GB.
When I try to remove some of largest apps, free space appears but shortly after is back to "Zero KB".
When connected to iTunes Audio + Photos + Apps + Documents & Data + Other + Free adds up to less than 7GB only.
Has anybody experienced anything similar or has any clue about where to look for a solution?
Edit: Found similar symptoms described in https://www.reddit.com/r/apple/comments/538v68/after_ios_10_update_storage_available_keeps/
Edit 2: I tried to delete some of recently updated apps to see if anyone of the could be causing the issues. The apps were: Pokemon Go, Hooks, Skype, 9GAG, Twitter, JIRA Cloud, Audible, Endomondo, Netflix, Google maps, Instagram, Taxify. It looks as uninstalling an reinstalling them might have restored small part of the lost storage space, but definately not all. Will continue to investigate and report