Normal
My system doesn't have the problems you're describing (thankfully! :wink: ) but I can say that the channel changes, while quick, do exhibit the "after 3 or 4 seconds it kind of hangs/stutters for about a second then it's ok". What I'm trying to say is that this happens on an otherwise perfectly operational system so you might want to disregard it as a symptom of your system's ill-health.