one turntable 2 deck control

Hey guys im currently using the umixcontrol pro 2 with a technics deck plugged in for time code control.
I can control both players with the one turntable however sometimes when I switch to the other player the current deck stops playing. I have automatic control mode ticked and the only thing I can see is that the relative mode symbol has an ! In it ....any ideas?
I can control both players with the one turntable however sometimes when I switch to the other player the current deck stops playing. I have automatic control mode ticked and the only thing I can see is that the relative mode symbol has an ! In it ....any ideas?