Live pwr fluctuation on screen with 4iiii

I have been using Zwift with a Stupid trainer since the beginning of May; I’m having great fun using Zwift. So this week I purchased a 4iiii power meter for my bike. Previously Zwift created the live power we all see on the screen and now the 4iiii is doing it. I am finding the live data I see on screen for power to be fluctuating quite a lot usually 20-40 watts sometime more. It came to some training stars not being achieved because of it :star_struck: :star_struck: My HR and cadence are pretty constant but the live power not… I’ve uploaded two graphs which have been created by Garmin Connect. Any tips and what I am missing?