It took me a while to reproduce (I cannot force it to happen) but this also happens when on local video playback. I tried changing the hdmi cable as well, no difference.
Since this does not happen with osmc on a raspberry pi2, could it be that the cec implementation for this machine is the cause of this? I ask this because a few times while just using the interface, Kodi suddenly stopped responding to my TV remote (osmc remote still worked) and the TV showed a popup telling me it lost connection, this happened both in the video list and on the "main" page. The only way to get the connection back was by restarting the vero 4k.