Uverse recordings freeze during playback if also recording to DVR
While watching programs previously recorded on my Uverse DVR, the picture & sound freezes for 2 seconds, then resumes. It does this about 1-3 times per minute. This only happens on one TV and only while something is being recorded on the DVR. I restarted everything, plugged the Uverse box directly into the wall, replaced the Uverse boxes, updated firmware, replaced HDMI cables and all the other standard fixes.
We have 2 wireless Uverse boxes and the one main DVR unit. This freezing problem only happens on one TV in our house, a TCL Roku TV. The freezing happens no matter which wireless box is connected to the TV or if the DVR is directly connected to this TV. It seems to only start happening if the DVR is recording something else at the time.
It seems like the problem must be with the TV itself, but it works perfectly with streaming services and with blu-rays.
What could be causing this, and short of buying a new TV, how can this be fixed?