DVR Playback Proble

I'm having a frustrating experience with Xfinity. Whenever I try to play back recorded programs, especially sports and the Olympics, the DVR either skips to the end of the program or stops altogether. It takes multiple attempts of rewinding and restarting to finally watch the complete program. For example, I had to restart at least 8 times just to see the end of the Men's basketball game. I've tried troubleshooting multiple times and even started a conversation with an agent, but I never received a response while I was connected. I also posted my question here and got no response. When I searched for answers, I found that similar cases were closed 2-3 years ago. It's hard to believe that I'm the only one experiencing this.