I usually only have problems on my wired, 4200x Roku 3, during prime time. I have free tuners when the problem occurs. It doesn’t freeze, but slows down and and the preview thumb nails go blank. Then I use the elapsed time on the timer. When the problem occurs, it is sporadic. It happens for both old and new recordings.
My wifi 2720x, Roku 2 usually just slows down. Before the last upgrade the last upgrade, it did not stop but got very slow. Now it is better.
Why is my problem worse during prime time, when I have tuners free. I do not understand the preview generation process. I usually reboot all my eqipment before I go to bed. An old habit from the PC days.
Still it is better than the cable days. I feel the problems will be resolved and we get ocassional feed back.