Steam Support says this isn't a Steam Hardware issue because other players are having the same problem with mouse/keyboard. I can play about an hour and then unexpectedly at no particular place the Steam Link/Steam Controller freeze. I can run over to my keyboard and play fine. Other players are reporting that their mouse/keyboard freeze. I haven't seen those reports but I am wondering if anyone else is having freezing issues. I have found threads where people have mentioned but nobody replied. I submitted an online bug report but thought maybe someone on the forum would have an idea.