Problem with 332/350 power saving if you also use an OC streamer with system automation

I have run into a strange problem since I enabled system automation on my nd555 connected to 332/350.
The system automation works I can use the nd555 remote both to control the streamer but also the 332 volume and mute.
However the usual behavior in my 332/350 to shut down after 20 m minutes stops working as soon as I enable system automation.
The 332/350s still shut down and power up just by pressing the 332 remote or one of the units, so the feature works, but it does not kick in after 20 minutes inactivity as it does when the system automation cable is not used from the 555.
This seems to be a bug unles there is firmware that I have not installed on the 332 or something else I am not doing as I should.
I am using the supplied optical cables that came with the 350s and a new trigger mono cable as adviced from the 555 to the 332.

Claus