My Optik TV doesn’t like hockey on CBC. The picture freezes constantly and the sound is terrible. If I switch to Sportsnet it works perfectly. Soccer on FOX does the same, my picture froze but the sound kept pace with the game. Recorded programs have a habit of playing in stops and starts. I have put in a new wired box and tried a new HDMI cable, but no improvement. Any ideas on how to fix it? Or do I have to go back to Shaw?