Yeah, you’ll find that the play icon on the EPG item is removed when the regular scheduled time is over. So if you have scheduled extra time (like most do with live sports), there’s no way to begin playback during that extra time. You have to wait until the recording is completely finished.
Or as I like to put it: A perfect recreation of a retro VCR-like experience from the 80s/90s when you had to wait for recordings to finish before you could watch.
Problem has existed for well over 3 years.