Q: iCloud drive sync not working on iOS 10

after upgrade iOS 10.

icloud drive(on iOS) can't search file in icloud drive.

so i turn off icloud drive on iPhone setting, then turn on icloud drive.

my problem started.

my icloud drive not sync any file, any folder. (can sync through that folders "preview, keynote, pages....")

ah!

my mac and icloud.com can sync each other. only not working ios.

i have headache because this problem...

anybody help me.... please