The commercial detection marked the last 9 minutes of a show as a commercial break.
Since the show was not over when this last commercial segment started, I tried to jump ahead/fast forward but nothing happened.
My wife and I had to sit through a couple of minutes of commercials so that we could see the end of the show.
This happened using a TiVo Stream 4K and also on my Android phone. Both have Channels Whole Home DVR Beta (1.9.2148).
I recorded a couple of short videos of my TV screen, if you want to see it in action.