I have the brand new Wahoo Kickr 2. The first month it worked great. Now when I try and do a workout in ERG mode the watts jump all around in Zwift and I cannot hold a specific wattage. Mind you, this is ERG mode and the first month it held perfectly in the Zwift wattage zone. I calibrate, calibrated again, again, again and again using the spindown app. Uplugged, and calibrated again and again. Has anyone experienced this problem and know how I might fix it. Frustrated as I feel like I bought a $1200 piece of junk.