FLX 10 BEAT SYNC = BROWSE MODE

Hello, i have a problem with my FLX 10. I have been using this controller for one year and everything was fine. Few weeks back controller started to do something strange. 

If i hit BEAT SYNC button, controller jumps from horizontal view to browse view + goes into SLIP mode

If i hit DRUMS (stems separation) he turns off all stems.

I have tried Rekordbox 6 (latest version), Rekordbox 7 (latest version) and Serato DJ Pro (latest version) and in all of them controller does the same thing.