Sometimes when I enter a channel it'll tkae up to a minute for it to load then my controller comes on. This happens rarely but it happens.
Soemtimes also I turn off the console and then all of a sudden my controller aint' synced anymore so have to sync it. Takes afew tries but you'll get it. This happens so rarely that it's really not much of a problem. Usually happens when I use the remote or Wii alot then switch to a new wiimote while the other one charges.