Recording problem

I’ve been having a problem with scheduled recordings only recording a partial show. I’ve searched this forum and found this topic a year ago. Some said it was foreign channels. Some said not. There was all kinds of confusing discussion about cloud and local saving. The answer was that the problem is being worked on in the back end by comcast technicians. I have not found a resolution to this problem.

What is the resolution? What mist I do to make it work right?