Zwift Play brakes when I change gears

I use zwift play and a tacx flux. I have noticed when I change gear the brake light shows up and my bike slows down. Today I did a slow gear change to avoid the chain falling off and my bike came to a stop.

Probably worth adding an image of your handbars as i can only assume you are catching the play paddles and pushing them in wards causing it to brake.

is it possible to attach them a bit lower maybe?

Most likely the shifter is enganing with the orange paddle with out you realising it. Small adjust to the position of the play units should resolve this