Vega g2 says goodbye after few minutes

have g2 connected to vega g2 thru Link
G2 is connected with ethernet
All works fine, except that after few minutes 5, 20, 30 tha vega disconnects, says goodbye and system stops
have to go to the knob, and select Link again to star working again
Network is 1GB Cable and works fine
Using Roon on NAS server
Any suggestions please

Would like to post my reply on email as well, I think there are interfering from other remote control that caused SmartIR to think there is command. Suggestion is to erase all pre-existing SmartIR mapping on ARIES G2 and VEGA G2 and learn again under a clean environment.