Sometimes, on a random flight, with the switches set up correctly and the aircraft is in takeoff configuration, when I try to use autothrottle especially during cruise, descent, and landing, the logic slowly pulls it towards IDLE and I lose speed, even with the speed set at 440kts IAS or with MACH HOLD/IAS HOLD (the ones on the left side of the panel). The bug begins during the cruise phase and continues for the rest of the flight. Restarting the sim SOMETIMES helps.
