Hi Daniele,
Rebooting the TV box fixes the problem each time. But at night, I turn all my “entertainment” equipment off, so the problem often re-occurs the next day. Not always - maybe ½ to ⅔ of the time.
My UPC TV box is connected directly to my ConnectBox with an ethernet cable.
My best guess is that when the TV box boots up, if it doesn’t have internet access during a particular point during its boot cycle, it disables replay and never re-enables it even though internet access becomes available a minute or two later.
My second best guess is that with the box in standby for a few hours it then disables replay.
I’m doing some more testing to see if I can narrow it down. The problem isn’t a big one for me as a reboot of the TV box fixes it and, unlike the old Horizon box, a reboot is pretty quick.
I’ll post again after some more testing, if I can determine exactly which of my guesses above is correct. Or if they’re both wrong 🙂