Sound issue when pedalling

Hi all, new to zwift and beginner cyclist.

Recently just set up my trek domane al2 on a wahoo kickr, didn’t have any issue when running it with cassette. Purchased a zwift cog and I’m getting this weird “lock” sound or interrupted pedalling feeling as if the resistance was dropping.

Would like to upload a video but not sure how to- any advice on how or why this is happening?

Hi @Russ_S1 welcome to Zwift forums.

Shuji at Zwift HQ here. I see you’ve emailed the video twice to my Support Colleagues. That is the correct way to get one-on-one assistance. Please stand by for one of our trainer specialists to reply via email. I’m closing this topic to avoid triplicate work from Zwift Support.