Noise on lower cogs with new Kickr and new Bike

Equipment
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1

Noise on the lowest two cogs. I just got my Wahoo Kickr Smart Trainer. I’ve set it up with a 2021 Giant Contend AR 1. I’ve noticed that when the chain is on the lowest two cogs I hear this rattling sound. My bike is 700x32c, 11 Spd rear cassette (so I’m using the supplied one), 142mm Thru axel. When I move the gears to the middle cogs it’s really smooth. Any suggestions?

link to photos.app.goo.gl

Thanks,
Sean

2

Solved. Combination of tuning the indexing in the rear derailleur and avoiding cross chaining with the small ring. That’s it!!