I have no problem with OTA recordings on my DVR. I record the local CBS almost every night for 1 or 2 hours with no problem playing back later or during the recording.
Well, not no problem. I thought the timer was supposed to slide on runovers. Or is that just the show, like sports that is scheduled to run , 5-7pm, for instance, but runs 5 - 7:43. Shous the recording of the show scheduled at 7pm slide, too? Or just the program that runs long? I lost Sunday nights shows because of this and CBS, for decades, has done this overrun on Sundays. They like the offset as people will tend to stay with them, rather than joing a show mid-stream.