Did the live event overrun its schedule slot? Does the length of the recording match the timeslot shown on the EPG? And is the length of the recording what you'd expect?
Press "play" during the programme to bring up the status bar - does the red completely fill the length of the bar? If so, the recording is complete to its scheduled length.
Most live programmes in the EPG prompt you for extending the length of the recording, to allow for this scenario.
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