Bug in uTrack 24 with Master and 1 Slave

Yes you understand correctly.
The Slave will play though. When I hit play on the master the Slave’s Play and Record backlights go out.

Today I have a new problem, this one is more serious.
The Slave started saying it has an error “Decoders Not Ready”
It does not follow the Master even though it is in Slave Mode.
This is a real problem.
I have tried different USB Drives and same problem, it is intermittent though.
Doesn’t happen all the time.
Have you heard of this error?

Thanks for your help.