Recording in the cloud vs DVR with hard drive

I am relatively new to Contour, and I am at my wits end. Cox set me up to record shows on their cloud server. When I try to watch a show recorded in the cloud, the playback is often interrupted by loss of picture, sound, or both, plus picture freezes. The frequency and severity of the problem varies, but at its worst, it renders the program unwatchable. During these periods, it is also impossible to use FAST FORWARD, as the picture freezes as the time line progresses, making it impossible to know when to stop FF. I have had three service calls, which have included replacing the coax in my house. The technician told me it was not at my end. Live TV does NOT have this problem, nor does ON DEMAND or streaming on Netflix.