What do you mean "other storage was gone". What is your other storage now,why its gone all of a sudden.
Well, I found out that my phone is now counting my app storage as my other storage. The other storage reads 7.30 GB, but my app storage reads 0 bytes. Also, if I delete an app that was .10 GB, then the other storage decreases by that same amount.
So I went to the Storage Check app, and I found that my music and apps and map data all combine to equal my total space used, with the exception of about a few hundred MB.
So I can conclude that the phone is calling my app storage "other" storage, but the actual other storage is really only about 200 MB.