Stay on top is not ticked. See attached picture.
Rebooted and right clicked at 21:11. Logs attached. Note the initial start failed as the background service had not started. I had to wait a short while and re-try.
I could be being a bit daft. What would Main Menu do anyway from the default landing screen? Isn't that the main menu? Having said that it does not work from the Live TV screen. I have to do Stop instead.
Failure from te Live TV screen happened around 21:22 and a few times before as I went into the Live TV menu and tried and exited it a few times using the Stop instead. Another log attached.
'Main Menu' will just take you back to the main menu (which you're already viewing in that screenshot above)...so yeah, I wouldn't expect it to do anything from there.
I think I have been mixing up Maim Menu and Settings for which I apologise. Having said that, Main Menu does not work from the Live TV page. Settings seems to work from both.