When it gets sluggish, try the original cable remote and see if it acts the same way. Unplug the cable box for a few minutes and plug it back in then see how it acts.
Many times when I have customers that complain about remote issues with their cable box I can usually show them that the original remote does it too.
Keep us informed!
There are 10 types of people in this world, There are those who understand binary, and those who don't!