DJS1000 Master-Sync Bug?

Hi, there is no clear djs section on the forum so i just post here like the other guys did. DJs1000 is connected to 3 cdj2000nxs2 and a djm900nxs2. When i  choose as master some of the 3 cdj's and play something, the i sync the djs1000 to it - hit play on djs1000 - stop or lower the cdj's channel fader, correctly the djs1000 will be master automatically. But when i hit play again on some cdj - stop or lower the ch. fader of the djs1000 it still remains as master.