I set down on the main gear, idle the throttle and deploy speed brakes, and continue aero-braking on my back wheels. To make sure the throttle is idle, I push it forward slightly and then back again; you can hear this change in engine note at 0:22 .
Then I apply the brakes and let the aircraft tip onto the nosewheel. As soon as I do this, the engine aperture relaxes and the engine note changes. Note that the throttle remained at idle during all this.
This is a bug, right?
It's reproducible. I have verified my axis settings, nothing is interfering with my throttle. I am using the toe brakes on my pedals to wheel brake.