[TESTING] Linux 4.9 kernel and improved video stack for Vero 4K / 4K +

I seem to lose a connection between the Vero and my TV after a day or two of not using it.
The Vero is accessible through SMB and it is still downloading torrents with the Transmission app installed on it. But my screen on the HDMI input is black. This appears to happen when I don’t watch anything for some time.
My TV does recognize there is a connection otherwise it would show a blue screen with a message that there is not input device. This should mean the TV sees the Vero but the Vero shows a black screen and doesn’t react to inputs from the remote.
Is this a known issue?