Hi Justin, Tipps,
sorry for the delay of my answer (holidays, work, etc....).
I installed the last software versión you told me, and the system works smoother.
But...the standby issue is still happening in my case. Not always, but most of times. I didn't know that this issue was associated to the TV used.
When I lose my connection I only have to disabled Ethernet connection and enabled again in the settings and I recover my Internet connection.
Thanks both for your support